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Ectopic testis in coati (Nasua nasua Linnaeus, 1766)

Testículo ectópico em quati (Nasua nasua Linnaeus, 1766)

ABSTRACT:

This paper reports a case of unilateral extracorporeal ectopic testes in a captive coati (Nasua nasua) in the State Park of Dois Irmãos Zoo, Recife/PE, Brazil. The testicle was located in the subcutaneous tissue of the inguinal region not adhered to the surrounding tissues. After bilateral orchiectomy, both testes were measured, fixed with 10% formalin buffered and embedded in paraffin for histopathological evaluation. The left testis measured 1.2 cm width by 1.7cm length, and the right one measured 1.5 cm width by 2.0 cm length. The ectopic testes had seminiferous epithelium without post-meiotic germ cell lines. The non-ectopic testis had several changes in the seminiferous epithelium that indicated degeneration. In both epididymis, the lumen did not contain sperm and the major epithelial structural alterations were more distinct in the epididymis associated to the ectopic testicle. In conclusion, the ectopic testis and epididymis had lesions compatible with testicular exposition to body temperature. Non-ectopic epididymis and testis had minor lesions but could be related to the infertility of the coati.

INDEX TERMS:
Coati; Nasua nasua; ectopic; testis; morphology; histopathology; wild animals; Procyonidae.

RESUMO:

O artigo relata um caso de testículo ectópico em quati de cativeiro (Nasua nasua) no Zoológico do Parque Estadual Dois Irmãos, Recife/PE. O testículo encontrava-se localizado no tecido subcutâneo da região inguinal, sem estar aderido aos tecidos circunvizinhos. Após orquiectomia bilateral, ambos os testículos foram mensurados, fixados em formol a 10% e embebidos em parafina para avaliação histopatológica. O testículo esquerdo mediu 1,2cm de largura por 1,7cm de movimento; e o testículo direito mediu 1,5cm de largura por 2,0cm de comprimento. O testículo ectópico apresentou epitélio sem linhagem de células germinativas pós-meióticas. O testículo não ectópico apresentou alterações no epitélio seminífero caracterizando degeneração. Em ambos os epidídimos, o lúmen não continha espermatozoides e as principais alterações estruturais do epitélio foram mais distintas no epidídimo associado ao testículo ectópico. Conclui-se que o testículo ectópico e epidídimo apresentaram lesões características de aumento de temperatura. O testículo e epidídimo não ectópico apesentaram lesões menores mas que puderam ser associadas à infertilidade do quati.

TERMOS DE INDEXAÇÃO:
Quati; Nasua nasua; ectópico; testículo; histopatologia; animais selvagens; Procyonidae.

Introduction

Coatis (Nasua nasua) have high adaptability (Beisiegel 2001Beisiegel B.M. 2001. Notes on the coatis, Nasua nasua (Carnivora: Procyonidae) in an Atlantic Forest area. Braz. J. Biol. 61:689-692., Franciolli et al. 2007Franciolli A.L.R., Costa G.M., Mançanares C.A.F., Martins D.S., Ambrosio C.E., Miglino M.A. & Carvalho A.F. 2007. Morfologia dos órgãos genitais masculinos de quati (Nasua nasua Linnaeus, 1766). Biotemas 20:27-36., Campos 2009Campos P.K.A. 2009. Avaliação morfofuncional do testículo de quatis (Nasua nasua Linnaeus, 1766) adultos. UFV, Minas Gerais. Available at <Available at http://www.tede.ufv.br/tedesimplificado/tde_arquivos/31/TDE-2009-06-26T070207Z-1711/Publico/texto%20completo.pdf > Accessed on May 5, 2014.
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) and are distributed in almost all-Brazilian territory (Teixeira & Ambrosio 2006Teixeira R.H.F. & Ambrosio S.R. 2006. Carnívora-Procyonidae (quati, mão-pelada, jupará), p.571-583. In: Cubas Z.S., Silva J.C.R. & Catão-Dias J.L. (Eds), Tratado de Animais Selvagens. Roca, São Paulo, SP.). Despite this, little is known regarding the reproductive biology and sex abnormalities in this species.

Cryptorchidism is a sex-linked autosomal hereditary disorder, characterized by the absence of one or both testes in the scrotum; the ectopic testis may remain in the pre-scrotal, inguinal or abdominal region (Nascimento & Santos 2003Nascimento E.F. & Santos R.L. 2003. Patologia da Bolsa Escrotal e dos Testículos, p.93-104. In: Nascimento E.F. & Santos R.L. (Eds), Patologia da Reprodução dos Animais DomésticosGuanabara Koogan, Rio de Janeiro., Maestri 2007Maestri J.S. 2007. Incidência de neoplasia testicular em cães criptorquidasUniversidade Castelo Branco, Ponta Grossa. Available at <Available at http://www.qualittas.com.br/uploads/documentos/Incidencia%20de%20Neoplasia%20Testicular%20em%20Caes%20Criptorquidas%20-%20Juliana%20Sousa%20Maestri.PDF Accessed on May 5, 2014.
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). Predisposing factors can be related to this disorder such as testicular hypoplasia, estrogen exposure, impairment of the blood supply to the testes during fetal life, infections during testicular descent (Romagnoli 1991Romagnoli S.E. 1991. Canine cryptorchidism. Vet. Clin. North Am., Small Anim. Pract. 21:533-544., Facemire et al. 1995Facemire C.F., Gross T.S. & Guillette Jr L.J. 1995. Reproductive impairment in the Florida panther: nature or nurture? Environ. Health Perspect. 103:79-86., Johnston et al. 2001Johnston S.D., Kustritz M.V.R. & Olson P.N.S. 2001. Disorders of the canine testes and epididymis, p.312-332. In: Johnston S.D. (Ed.), Canine and Feline Theriogenology. W.B. Saunders, Philadelphia.), maternal vitamin A deficiency during fetal development, exposure to environmental contaminants and low genetic variability (O'Brien et al. 1990O'Brien S.J., Roelke M.E., Yuhki N., Richards K.W., Johnson W.E., Franklin W.L., Anderson A.E., Bass Jr O.L., Belden R.C. & Martenson J.S. 1990. Genetic introgression within the Florida panther Felis concolor coryiNatl Geogr. Res. 6:485-494., Roelke et al. 1993Roelke M.E., Martenson J.S. & O'Brien S.J. 1993. The consequences of demographic reduction and genetic depletion in the endangered Florida panther. Curr. Biol. 3:340-350., Barone et al. 1994Barone M.A., Roelke M.E., Howard J.G., Brown J.L., Anderson A.E. & Wildt D.E. 1994. Reproductive characteristics of male Florida panthers: comparative studies from Florida, Texas, Colorado, Latin America, and North American Zoos. J. Mammal. 75:150-162., Facemire et al. 1995Facemire C.F., Gross T.S. & Guillette Jr L.J. 1995. Reproductive impairment in the Florida panther: nature or nurture? Environ. Health Perspect. 103:79-86., Dunbar et al. 1996Dunbar M.R. & Cunningham M.W., Wooding J.B. & Roth R.P. 1996. Cryptorchidism and delayed testicular descent in Florida black bears. J. Wildl. Dis. 32:661-664., Mansfield & Land 2002Mansfield K.G. & Land E.D. 2002. Cryptorchidism in Florida panthers: prevalence, features, and influence of genetic restoration. J. Wildl. Dis. 38:693-698.). Ectopic testis are associated with several clinical finds including testicular neoplasia, oligospermic or azoospermic animals, increase in local sensitivity, behavioral disorders, irritability or hypersexuality, dermatopathies and torsion of the spermatic cord (Mattos et al. 2000Mattos M.R.F., Pereira B.S., Domingues S.F.S., Costa M.A.L. & Lima P.R.B. 2000. Criptorquidismo em um cão: relato de caso. Ciência Animal 10:61-70., Morris & Dobson 2001Morris J. & Dobson J. 2001. Small Animal Oncology. Blackwell Science, Oxford., Hahn 2002Hahn K.A. 2002. Veterinary Oncology. British Library, Butterworth., Daugaard et al. 2006Daugaard G., Karas V. & Sommer P. 2006. Inguinal metastases from testicular câncer. BJU Int. 97:724-726., Maestri 2007Maestri J.S. 2007. Incidência de neoplasia testicular em cães criptorquidasUniversidade Castelo Branco, Ponta Grossa. Available at <Available at http://www.qualittas.com.br/uploads/documentos/Incidencia%20de%20Neoplasia%20Testicular%20em%20Caes%20Criptorquidas%20-%20Juliana%20Sousa%20Maestri.PDF Accessed on May 5, 2014.
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, Timothy et al. 2007Timothy M., Fan T.M. & Lorimier L.P. 2007. Tumors of the male reproductive system, p.54-67. In: Iboid. (Ed.), Small Animal Clinical Oncology. Saunders Elsevier, St Louis.).

Cryptorchidism can be detected by inspection and palpation during physical examination (Maestri 2007Maestri J.S. 2007. Incidência de neoplasia testicular em cães criptorquidasUniversidade Castelo Branco, Ponta Grossa. Available at <Available at http://www.qualittas.com.br/uploads/documentos/Incidencia%20de%20Neoplasia%20Testicular%20em%20Caes%20Criptorquidas%20-%20Juliana%20Sousa%20Maestri.PDF Accessed on May 5, 2014.
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). Bilateral orchiectomy is the treatment of election to avoid possible clinical complications and hereditary transmission (Mattos et al. 2000Mattos M.R.F., Pereira B.S., Domingues S.F.S., Costa M.A.L. & Lima P.R.B. 2000. Criptorquidismo em um cão: relato de caso. Ciência Animal 10:61-70., Nascimento & Santos 2003Nascimento E.F. & Santos R.L. 2003. Patologia da Bolsa Escrotal e dos Testículos, p.93-104. In: Nascimento E.F. & Santos R.L. (Eds), Patologia da Reprodução dos Animais DomésticosGuanabara Koogan, Rio de Janeiro., Maestri 2007Maestri J.S. 2007. Incidência de neoplasia testicular em cães criptorquidasUniversidade Castelo Branco, Ponta Grossa. Available at <Available at http://www.qualittas.com.br/uploads/documentos/Incidencia%20de%20Neoplasia%20Testicular%20em%20Caes%20Criptorquidas%20-%20Juliana%20Sousa%20Maestri.PDF Accessed on May 5, 2014.
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).

Despite cryptorchidism being an affliction that is frequently reported in pets, with prevalence of 13% in dogs (Mickelsen & Memon 1997Ono k. & Sofikitis N. 1997. A novel mechanism to explain the detrimental effects of left cryptorchidism on right testicular function. Yonago Acta Med. 40:79-89.), it is not in wild animals. Cryptorchidism has been described in the manned wolf (Chrysocyon brachyurus), raccoon (Procyon cancrivorus), black bear (Ursus americanus) and puma (Puma concolor coryi) (Burton & Ramsey 1986Burton M. & Ramsay E. 1986. Cryptorchidism in maned wolves. J. Zoo. An. Med. 17:133-135., Dunbar et al. 1996Dunbar M.R. & Cunningham M.W., Wooding J.B. & Roth R.P. 1996. Cryptorchidism and delayed testicular descent in Florida black bears. J. Wildl. Dis. 32:661-664., Mansfield & Land 2002Mansfield K.G. & Land E.D. 2002. Cryptorchidism in Florida panthers: prevalence, features, and influence of genetic restoration. J. Wildl. Dis. 38:693-698., Dias et al. 2007Dias C.B.V., Souza T.D., Silva S.M., Melotti T. & Leite F.L.G. 2007. Criptorquidismo em Procyon cancrivorus (G. Cuvier, 1798) de vida livre do litoral do Espírito Santo, Brasil. I Encontro Internacional de Medicina da Conservação, Vitória, Espírito Santo, p.16.).

This is the first ectopic testis case reported in coati (Nasua nasua), detailing its clinical evaluation and histopathologic findings.

Materials and Methods

A male captive coati, Nasua nasua (Fig.1A), about 10 years age, 4.1 kg, from the Zoo of Dois Irmãos State Park (Latitude: 8°0'20.79"S, Longitude: 34°56'51.85"O), Northeast of Brazil, was subjected to clinical examination. The animal was housed with 10 others coatis, in proportion of two males for nine females. During the physical examination, ectopic testicle was detected in the subcutaneous tissue of the inguinal region. The right testicle was located in the scrotum (Fig.1B,C). The animal had an appropriate body score and healthy mucosa. Physiological parameters including heart (155bpm), respiratory frequency (23mpm), and rectal temperature (37.1oC) were considered normal for this species. After clinical examination, it was recommended a bilateral orchiectomy.

Fig.1
Left unilateral cryptorchidism in coati. (A) The coati (Nasua nasua). (B) Left unilateral cryptorchidism in coati. Left Testicle located in the subcutaneous tissue of the inguinal region (arrow I). Right testicle with an ovoid shape and visualization of the epididymis under the skin layer (arrow II). (C) Ectopic testis without adherence during palpation. (D) Testicles (right and left) after surgical excision.

The animal was submitted to 20 hours of food restriction prior to surgery and after physical restraint it was anesthetized with ketamine 10% (10mg/kg/IM, Cetamin 10% Syntec®, Cotia, SP, Brazil) and xylazine 2% (1mg/kg/IM, Xilazina 10% Syntec®, Cotia, SP, Brazil). Following tracheotomy, surgical area was sterilized with 70% alcohol, 10% povidone iodine and 2% chlorhexidine. Surgical access was accomplished by a midline incision of the pre-scrotal region and the testes removed. During the post-operative period, single doses of procaine benzylpenicillin (20.000UI/kg/IM, Agrovet, Novartis®, São Paulo, SP, Brazil), meloxicam (0.2mg/kg/IM, Maxican, Ourofino®, Cravinhos, SP, Brazil) and topical antibacterial and anti-inflammatory cream (Quadriderm, Schering Plough®, Cotia, SP, Brazil) were administered to the animal.

Testis and epididymis (Fig.1D) were fixed in 10% buffered formalin and stored for 48 hours in 70% alcohol. Tissue fragments were embedded in paraffin and 5μm sections were cut and stained with hematoxylin-eosin (HE) (Behmer et al. 1976Behmer O.A., Tolosa E.M.C. & Freitas Neto A.G. 1976. Manual de Técnicas para Histologia Normal e Patológica. EDART/USP, São Paulo.) for histophatologic evaluation.

Results

Testicular measurements revealed that ectopic testicle had 1.2cm width and 1.7cm length, while the right testis had 1.5cm width and 2.0cm length (Fig.1D).

Histopathological evaluation of the ectopic testicle revealed the absence of germ cells in the seminiferous epithelium, Sertoli cells with extensive vacuolation, whereas Leydig cells had normal morphology (Fig.2A-C). In the contra-lateral testicle, seminiferous tubules revealed a reduction in the epithelium height, slough of germ cells and vacuoles in pre and post-meiotic stages. Leydig cells had normal morphology with a higher number of cells in the interstitial space when compared to the numbers observed in the ectopic testis (Fig.2D).

Fig.2
Ectopic testis (left testicle) and non-ectopic testis (right testicle) of coati. (A) Right testicle. Seminiferous tubules in cross section (ST) showing reduced height of the germinal epithelium, desquamation and vacuolization of germ cells. (B) Right testicle. Observe the sloughing of germinal epithelium characterized by increased space between germ cells, and primordial germ cell in the seminiferous epithelium (yellow arrow). A Sertoli cell (black arrow) without morphological changes and different germ cells in the seminiferous epithelium. Round spermatids (Ar) and elongated spermatids (Sptz). (C) Right testicle. Seminiferous tubules in cross section (ST) with vacuolated germ cells (arrowheads). Leydig cells (red arrow) in the intertubular space (Isp). (D) Left testicle. Ectopical testicle in coati. Seminiferous tubules in cross section (ST). Observe the reduction of the seminiferous epithelium height and vacuolization of Sertoli and germ cells. Between the seminiferous tubules, note increased intertubular space (Isp). (E) Left testicle. Seminiferous tubules in cross section (ST). Note Sertoli cells with extensive cytoplasmatic vacuolization (yellow arrow). Observe absence of germ cells in the seminiferous epithelium or degenerating germ cells (arrows). Leydig cells in large numbers (red arrow) and with normal morphology. (F) Left testicle. Seminiferous tubules in cross section (ST). Sertoli cells with extensive cytoplasmatic vacuolization (arrows). Note the absence of germ cells in the seminiferous epithelium or in an advanced stage of degeneration.

The epididymis located in the scrotum had a normal epithelium, columnar cells showing normal sterocilia, although some basal cells had different degrees of vacuolation. Spermatozoa were not observed in the epididymal lumen (Fig.3A,B). The epididymis associated with the ectopic testicle had absence of stereocilia in the apical aspect of the columnar cells, sloughed and vacuolated cells (Fig.3C,D).

Fig.3
Ectopic epididymis associated with the left testicle and non-ectopic epididymis associated with the right testicle of coati. (A) Non-ectopic epididymis. Epididymal duct (Ed) in cross section. Note the presence of cells in the lumen (black arrow) and some lumens without cells (yellow arrow). (B) Non-ectopic epididymis. Note epithelium of the epididymal duct with stereocilia on columnar cells (arrow) and vacuolization and pyknosis of the basal cells (arrowhead). (C). Epididymis associated with the ectopic testicle of coati. Epididymal duct (Ed) in cross section. Note the absence of sperm in the lumen (arrow). (D) Note absence of stereocilia on the columnar cells (arrow) in the epididymal epithelium. Pyknosis and vacuolization were observed in the basal cells (red arrow).

Discussion

According to the literature, the data presented in this paper is the first report of unilateral ectopic testis in coati. Reports of cryptorchidism in wild animals are scarce. In Brazil, reports have described the occurrence of right unilateral cryptorchidism located in the subcutaneous tissue of the inguinal region in a raccoon (Procyon cancrivorus) (Dias et al. 2007Dias C.B.V., Souza T.D., Silva S.M., Melotti T. & Leite F.L.G. 2007. Criptorquidismo em Procyon cancrivorus (G. Cuvier, 1798) de vida livre do litoral do Espírito Santo, Brasil. I Encontro Internacional de Medicina da Conservação, Vitória, Espírito Santo, p.16.). Burton & Ramsay (1986)Burton M. & Ramsay E. 1986. Cryptorchidism in maned wolves. J. Zoo. An. Med. 17:133-135. observed a case of monorchidism in four manned wolves (Chrysocyon brachyurus) born in two litters from a North American zoo. Dunbar et al. (1996)Dunbar M.R. & Cunningham M.W., Wooding J.B. & Roth R.P. 1996. Cryptorchidism and delayed testicular descent in Florida black bears. J. Wildl. Dis. 32:661-664. analyzed 71 black bears (Ursus americanus) in Florida and observed cryptorchidism in four (5.6%) animals, three being unilateral with the testicle located in the inguinal region (two on the right and one on the left), and a bilateral case with both testes found in the abdominal region. In all cases, the testis had reduced dimensions compared with the normal descended testis (Dunbar et al. 1996Dunbar M.R. & Cunningham M.W., Wooding J.B. & Roth R.P. 1996. Cryptorchidism and delayed testicular descent in Florida black bears. J. Wildl. Dis. 32:661-664., Dias et al. 2007Dias C.B.V., Souza T.D., Silva S.M., Melotti T. & Leite F.L.G. 2007. Criptorquidismo em Procyon cancrivorus (G. Cuvier, 1798) de vida livre do litoral do Espírito Santo, Brasil. I Encontro Internacional de Medicina da Conservação, Vitória, Espírito Santo, p.16.), corroborating with the findings in the presented report.

The length/width of the normal descended testis of the coati reported in the present study were lower compared to the findings described by Queiroz et al. (2010)Queiroz J.P., Barros F.F., Lima G.L., Castelo T.S., Freitas C.I. & Silva A.R. 2010. Assessment of orchidometry and scrotal circumference in coatis (Nasua nasua). Reprod. Domest. Anim. 45:382-386. who evaluated the reproductive anatomy of five normal pubertal coatis. The study revealed that the length and width of the right testis was 1.7±0.2 and 2.6±0.2; and left testis was 1.7±0.1 and 2.5±0.3 respectively, but had similar sizes when compared to the results reported by Franciolli et al. (2007)Franciolli A.L.R., Costa G.M., Mançanares C.A.F., Martins D.S., Ambrosio C.E., Miglino M.A. & Carvalho A.F. 2007. Morfologia dos órgãos genitais masculinos de quati (Nasua nasua Linnaeus, 1766). Biotemas 20:27-36. who evaluated the anatomy of two coatis.

Dunbar et al. (1996)Dunbar M.R. & Cunningham M.W., Wooding J.B. & Roth R.P. 1996. Cryptorchidism and delayed testicular descent in Florida black bears. J. Wildl. Dis. 32:661-664. described the occurrence of cryptorchidism and a delay in testicular descent in black bears (U. Americanus) during the first year of life. In domestic dogs, testicular descent can occur between four and five weeks and, usually, six to eight weeks after birth (Nascimento & Santos, 2003Nascimento E.F. & Santos R.L. 2003. Patologia da Bolsa Escrotal e dos Testículos, p.93-104. In: Nascimento E.F. & Santos R.L. (Eds), Patologia da Reprodução dos Animais DomésticosGuanabara Koogan, Rio de Janeiro.). However, the diagnosis of cryptorchidism in this species becomes possible after six months of age (Mickelsen & Memon 1997Mickelsen D.W. & Memon M.A. 1997. Distúrbios hereditários e congênitos dos sistemas reprodutivos do macho e da fêmea, p.2326-2331. In: Ettinger S.J. & Feldman E.C. (Eds), Tratado de Medicina Interna Veterinária. Manole, São Paulo, SP.). In coatis, there is no information in the literature regarding the migration time of the testes into the scrotum.

Cryptorchidism in captive wild animals can help to indentify populations that possibly suffer with inbreeding, exposure to certain chemical products of biological risks and nutritional deficiencies (Roelke et al. 1993Roelke M.E., Martenson J.S. & O'Brien S.J. 1993. The consequences of demographic reduction and genetic depletion in the endangered Florida panther. Curr. Biol. 3:340-350., Dunbar et al. 1996Dunbar M.R. & Cunningham M.W., Wooding J.B. & Roth R.P. 1996. Cryptorchidism and delayed testicular descent in Florida black bears. J. Wildl. Dis. 32:661-664., Mansfield & Land 2002Mansfield K.G. & Land E.D. 2002. Cryptorchidism in Florida panthers: prevalence, features, and influence of genetic restoration. J. Wildl. Dis. 38:693-698.). Burton & Ramsay (1986)Burton M. & Ramsay E. 1986. Cryptorchidism in maned wolves. J. Zoo. An. Med. 17:133-135. discussed the possibility of a correlation between the appearance of birth defects and loss of genetic diversity in manned wolves from North American zoos. Keller & Waller (2002)Keller L.F. & Waller D.M. 2002. Inbreeding effects in wild populations. Trends Ecol. Evol. 17:230-241. observed the effect of endogamy in wild species, demonstrating an increasing in the number of cases of anomalies related to homozygous alleles.

In the present study, there is no information about the degree of kinship of coatis that live together for about 10 years at the zoo in Dois Irmãos State Park, except for two of them who were born about two years ago and have a common origin. Considering the etiologies described in the literature, the anomaly may be associated with a possible endogamy resulting from the reduction of gene flow in the enclosure, however consanguinity exams may be necessary to support this hypothesis.

The ectopic testicle may have influenced histopathological changes observed in the non-ectopic testicle. The negative effect of the ectopic or cryptorchid testicle on the function of the normally descended testis has been studied in humans and in experimental animals by Rager et al. (1975)Rager K., Arnold E., Hauschild A. & Guputa D. 1975. Effect of bilateral cryptorchidism on the in vitro transformation of progesterone by testicular tissue at different stages of sexual maturation. J. Steroid Biochem. 6:1537-1541., Jegou et al. (1983)Jegou B., Risbridger G.P. & De Krester D.M. 1983. Effects of experimental cryptorchidism on testicular function in adult rats. J. Androl. 4:88-94., Saalu et al. (2006)Saalu L.C., Togun V.A., Oyewopo A.O. & Raji Y. 2006. Artificial cryptorchidism and the moderating effect of melatonin in Sprague-Dawley rats. J. Appl. Sci. Environ. Manag. 6:2889-2894. and Saalu et al. (2007)Saalu L.C., Adesanya A.O., Oyewopo A.O. & Raji Y. 2007. An evaluation of the deleterious effect of unilateral cryptorchidism on the contra-lateral normally descended testis. Sci. Res. Essays 2:74-78., although it is not yet well established. Ono & Sofikitis (1997)Ono k. & Sofikitis N. 1997. A novel mechanism to explain the detrimental effects of left cryptorchidism on right testicular function. Yonago Acta Med. 40:79-89. suggested that the increased blood flow of the contra-lateral testis in animals with unilateral cryptorchidism could result in testicular degeneration. Kawakami et al. (1999)Kawakami E., Hori T. & Tsutsio T. 1999. Function of contralateral testis after artificial unilateral cryptorchidism in dogs. J. Vet. Med. Sci. 61:1107-1111. observed that in dogs the underwent unilateral cryptorchidism induced a decrease in the total sperm concentration, an increase in serum levels of estrogen, as well as a decrease in testosterone and luteinizing hormone (LH) levels. These authors suggested that an increase in estradiol levels should be responsible for the inhibition of endocrine functions and spermatogenesis of the contra-lateral testis (Kawakami et al. 1999Kawakami E., Hori T. & Tsutsio T. 1999. Function of contralateral testis after artificial unilateral cryptorchidism in dogs. J. Vet. Med. Sci. 61:1107-1111., Maestri 2007Maestri J.S. 2007. Incidência de neoplasia testicular em cães criptorquidasUniversidade Castelo Branco, Ponta Grossa. Available at <Available at http://www.qualittas.com.br/uploads/documentos/Incidencia%20de%20Neoplasia%20Testicular%20em%20Caes%20Criptorquidas%20-%20Juliana%20Sousa%20Maestri.PDF Accessed on May 5, 2014.
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).

In the ectopic epididymis epithelial cells were sloughed; basal cells had differing degrees of vacuolization and the columnar cells showed a reduction or an absence of stereocilia. Furthermore, spermatozoa were not observed in the epididymal lumen. Several factors may contribute to the pathology observed in the ectopic epididymis in this study, including exposure to a higher temperature as reported by Jara et al. (2002)Jara M., Esponda P. & Carballada R. 2002. Abdominal temperature induces region-specificindependent apoptosis in the cauda epididymidis of the mouse. Biol. Reprod. 67:1189-1196..

Different degrees of vacuolization in the basal cells and few luminal spermatozoa were observed in the lumen of the contra-lateral epididymis. This finding corroborates the degenerative changes observed in the seminiferous epithelium of the ectopic testis.

This is the first case report of an ectopic testicle in the coati. Testicular lesions were similar to those described in other mammalian species. The coati was considered infertile. Histopathological changes were observed in ectopic and contra-lateral testis as well as absence of spermatozoa in both epididymis. The ectopic testis and epididymis had lesions compatible with exposition to higher body temperature. Non-ectopic epididymis and testis had minor lesions but could also be a contributor to the infertility of the coati.

Acknowledgements

To Dr. Ricardo Chioratto for the orchiectomy performed at the coati and to the Environment and Sustainability Secretary (SEMAS) of the State of Pernambuco.

References

  • Barone M.A., Roelke M.E., Howard J.G., Brown J.L., Anderson A.E. & Wildt D.E. 1994. Reproductive characteristics of male Florida panthers: comparative studies from Florida, Texas, Colorado, Latin America, and North American Zoos. J. Mammal. 75:150-162.
  • Behmer O.A., Tolosa E.M.C. & Freitas Neto A.G. 1976. Manual de Técnicas para Histologia Normal e Patológica. EDART/USP, São Paulo.
  • Beisiegel B.M. 2001. Notes on the coatis, Nasua nasua (Carnivora: Procyonidae) in an Atlantic Forest area. Braz. J. Biol. 61:689-692.
  • Burton M. & Ramsay E. 1986. Cryptorchidism in maned wolves. J. Zoo. An. Med. 17:133-135.
  • Campos P.K.A. 2009. Avaliação morfofuncional do testículo de quatis (Nasua nasua Linnaeus, 1766) adultos. UFV, Minas Gerais. Available at <Available at http://www.tede.ufv.br/tedesimplificado/tde_arquivos/31/TDE-2009-06-26T070207Z-1711/Publico/texto%20completo.pdf > Accessed on May 5, 2014.
    » http://www.tede.ufv.br/tedesimplificado/tde_arquivos/31/TDE-2009-06-26T070207Z-1711/Publico/texto%20completo.pdf
  • Daugaard G., Karas V. & Sommer P. 2006. Inguinal metastases from testicular câncer. BJU Int. 97:724-726.
  • Dias C.B.V., Souza T.D., Silva S.M., Melotti T. & Leite F.L.G. 2007. Criptorquidismo em Procyon cancrivorus (G. Cuvier, 1798) de vida livre do litoral do Espírito Santo, Brasil. I Encontro Internacional de Medicina da Conservação, Vitória, Espírito Santo, p.16.
  • Dunbar M.R. & Cunningham M.W., Wooding J.B. & Roth R.P. 1996. Cryptorchidism and delayed testicular descent in Florida black bears. J. Wildl. Dis. 32:661-664.
  • Facemire C.F., Gross T.S. & Guillette Jr L.J. 1995. Reproductive impairment in the Florida panther: nature or nurture? Environ. Health Perspect. 103:79-86.
  • Franciolli A.L.R., Costa G.M., Mançanares C.A.F., Martins D.S., Ambrosio C.E., Miglino M.A. & Carvalho A.F. 2007. Morfologia dos órgãos genitais masculinos de quati (Nasua nasua Linnaeus, 1766). Biotemas 20:27-36.
  • Hahn K.A. 2002. Veterinary Oncology. British Library, Butterworth.
  • Jara M., Esponda P. & Carballada R. 2002. Abdominal temperature induces region-specificindependent apoptosis in the cauda epididymidis of the mouse. Biol. Reprod. 67:1189-1196.
  • Jegou B., Risbridger G.P. & De Krester D.M. 1983. Effects of experimental cryptorchidism on testicular function in adult rats. J. Androl. 4:88-94.
  • Johnston S.D., Kustritz M.V.R. & Olson P.N.S. 2001. Disorders of the canine testes and epididymis, p.312-332. In: Johnston S.D. (Ed.), Canine and Feline Theriogenology. W.B. Saunders, Philadelphia.
  • Kawakami E., Hori T. & Tsutsio T. 1999. Function of contralateral testis after artificial unilateral cryptorchidism in dogs. J. Vet. Med. Sci. 61:1107-1111.
  • Keller L.F. & Waller D.M. 2002. Inbreeding effects in wild populations. Trends Ecol. Evol. 17:230-241.
  • Maestri J.S. 2007. Incidência de neoplasia testicular em cães criptorquidasUniversidade Castelo Branco, Ponta Grossa. Available at <Available at http://www.qualittas.com.br/uploads/documentos/Incidencia%20de%20Neoplasia%20Testicular%20em%20Caes%20Criptorquidas%20-%20Juliana%20Sousa%20Maestri.PDF Accessed on May 5, 2014.
    » http://www.qualittas.com.br/uploads/documentos/Incidencia%20de%20Neoplasia%20Testicular%20em%20Caes%20Criptorquidas%20-%20Juliana%20Sousa%20Maestri.PDF
  • Mansfield K.G. & Land E.D. 2002. Cryptorchidism in Florida panthers: prevalence, features, and influence of genetic restoration. J. Wildl. Dis. 38:693-698.
  • Mattos M.R.F., Pereira B.S., Domingues S.F.S., Costa M.A.L. & Lima P.R.B. 2000. Criptorquidismo em um cão: relato de caso. Ciência Animal 10:61-70.
  • Mickelsen D.W. & Memon M.A. 1997. Distúrbios hereditários e congênitos dos sistemas reprodutivos do macho e da fêmea, p.2326-2331. In: Ettinger S.J. & Feldman E.C. (Eds), Tratado de Medicina Interna Veterinária. Manole, São Paulo, SP.
  • Morris J. & Dobson J. 2001. Small Animal Oncology. Blackwell Science, Oxford.
  • Nascimento E.F. & Santos R.L. 2003. Patologia da Bolsa Escrotal e dos Testículos, p.93-104. In: Nascimento E.F. & Santos R.L. (Eds), Patologia da Reprodução dos Animais DomésticosGuanabara Koogan, Rio de Janeiro.
  • O'Brien S.J., Roelke M.E., Yuhki N., Richards K.W., Johnson W.E., Franklin W.L., Anderson A.E., Bass Jr O.L., Belden R.C. & Martenson J.S. 1990. Genetic introgression within the Florida panther Felis concolor coryiNatl Geogr. Res. 6:485-494.
  • Ono k. & Sofikitis N. 1997. A novel mechanism to explain the detrimental effects of left cryptorchidism on right testicular function. Yonago Acta Med. 40:79-89.
  • Queiroz J.P., Barros F.F., Lima G.L., Castelo T.S., Freitas C.I. & Silva A.R. 2010. Assessment of orchidometry and scrotal circumference in coatis (Nasua nasua). Reprod. Domest. Anim. 45:382-386.
  • Rager K., Arnold E., Hauschild A. & Guputa D. 1975. Effect of bilateral cryptorchidism on the in vitro transformation of progesterone by testicular tissue at different stages of sexual maturation. J. Steroid Biochem. 6:1537-1541.
  • Roelke M.E., Martenson J.S. & O'Brien S.J. 1993. The consequences of demographic reduction and genetic depletion in the endangered Florida panther. Curr. Biol. 3:340-350.
  • Romagnoli S.E. 1991. Canine cryptorchidism. Vet. Clin. North Am., Small Anim. Pract. 21:533-544.
  • Saalu L.C., Togun V.A., Oyewopo A.O. & Raji Y. 2006. Artificial cryptorchidism and the moderating effect of melatonin in Sprague-Dawley rats. J. Appl. Sci. Environ. Manag. 6:2889-2894.
  • Saalu L.C., Adesanya A.O., Oyewopo A.O. & Raji Y. 2007. An evaluation of the deleterious effect of unilateral cryptorchidism on the contra-lateral normally descended testis. Sci. Res. Essays 2:74-78.
  • Teixeira R.H.F. & Ambrosio S.R. 2006. Carnívora-Procyonidae (quati, mão-pelada, jupará), p.571-583. In: Cubas Z.S., Silva J.C.R. & Catão-Dias J.L. (Eds), Tratado de Animais Selvagens. Roca, São Paulo, SP.
  • Timothy M., Fan T.M. & Lorimier L.P. 2007. Tumors of the male reproductive system, p.54-67. In: Iboid. (Ed.), Small Animal Clinical Oncology. Saunders Elsevier, St Louis.

Publication Dates

  • Publication in this collection
    Oct 2016

History

  • Received
    11 June 2015
  • Accepted
    05 July 2016
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