Proliferating trichilemmal cyst with clinical, radiological, macroscopic, and microscopic correlation

Proliferating trichilemmal cyst is an uncommon neoplasm arising from the follicular isthmus, whose histopathological hallmark is the presence of trichilemmal keratinization. We describe a case of proliferating trichilemmal cyst in a 57-year-old woman with a broad clinical, radiological, macroscopic and microscopic correlation.

Keywords:
Adnexal diseases; Cysts; Diagnostic imaging; Histology; Microscopy

Authorship

Ediel Valerio Mailing Address: Ediel Valerio. E-mail: edielvaleriosf@gmail.com

Department of Pathology, A.C. Camargo Cancer Center, São Paulo (SP), Brazil.A.C. Camargo Cancer CenterBrazilSão Paulo, SP, BrazilDepartment of Pathology, A.C. Camargo Cancer Center, São Paulo (SP), Brazil.

http://orcid.org/0000-0001-9546-8404

Fernando Henrique Sgarbi Parro

Department of Surgery, A.C. Camargo Cancer Center, São Paulo (SP), Brazil.A.C. Camargo Cancer CenterBrazilSão Paulo, SP, BrazilDepartment of Surgery, A.C. Camargo Cancer Center, São Paulo (SP), Brazil.

http://orcid.org/0000-0002-2384-6549

Mariana Petaccia de Macedo

http://orcid.org/0000-0002-0434-7605

Clovis Antonio Lopes Pinto

http://orcid.org/0000-0003-1711-0081

Mailing Address: Ediel Valerio. E-mail: edielvaleriosf@gmail.com

Conflict of Interest: None.

AUTHORS’ CONTRIBUTIONS

Ediel Valerio

0000-0001-9546-8404

Approval of the final version of the manuscript; Conception and planning of the study; Elaboration and writing of the manuscript; Obtaining, analyzing and interpreting the data; Critical review of the literature

Fernando Henrique Sgarbi Parro

0000-0002-2384-6549

Approval of the final version of the manuscript; Conception and planning of the study; Effective participation in research orientation; Intellectual participation in propaedeutic and/or therapeutic conduct of the cases studied; Critical review of the manuscript

Mariana Petaccia de Macedo

0000-0002-0434-7605

Approval of the final version of the manuscript; Conception and planning of the study; Effective participation in research orientation; Intellectual participation in propaedeutic and/or therapeutic conduct of the cases studied; Critical review of the manuscript

Clovis Antonio Lopes Pinto

0000-0003-1711-0081

Approval of the final version of the manuscript; Conception and planning of the study; Effective participation in research orientation; Intellectual participation in propaedeutic and/or therapeutic conduct of the cases studied; Critical review of the manuscript

SCIMAGO INSTITUTIONS RANKINGS

Figures

Figures (3)

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Figure 1
Clinical and imaging characteristics. A) Clinical examination evidencing a nodular lesion on the scalp, with a smooth surface and flexible skin, without abnormalities or phlogistic signs. B) Ultrasonography showing a cystic lesion with a heterogeneous solid area, in addition to hyperechoic areas

Thumbnail

Figure 2
Perioperative characteristics. A) Intraoperative aspect of lesion resection. B) Macroscopic aspect of the specimen at cut surface evidencing a cystic cavity with brownish content and lumpy walls with a whitish solid area inside

Thumbnail

Figure 3
Microscopic appearance of the lesion by the Hematoxylin & eosin staining. (A, x20) Panoramic photo showing cystic lesion (arrow) located in the subcutaneous tissue showing a scaly coating with trichilemmal keratinization (B, x40) characterizing the diagnosis of proliferating trichilemmal cyst. The squamous cell blocks in the proliferating component show no cytological atypias

Figure 1 Clinical and imaging characteristics. A) Clinical examination evidencing a nodular lesion on the scalp, with a smooth surface and flexible skin, without abnormalities or phlogistic signs. B) Ultrasonography showing a cystic lesion with a heterogeneous solid area, in addition to hyperechoic areas

Figure 2 Perioperative characteristics. A) Intraoperative aspect of lesion resection. B) Macroscopic aspect of the specimen at cut surface evidencing a cystic cavity with brownish content and lumpy walls with a whitish solid area inside

Figure 3 Microscopic appearance of the lesion by the Hematoxylin & eosin staining. (A, x20) Panoramic photo showing cystic lesion (arrow) located in the subcutaneous tissue showing a scaly coating with trichilemmal keratinization (B, x40) characterizing the diagnosis of proliferating trichilemmal cyst. The squamous cell blocks in the proliferating component show no cytological atypias

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