Treatment of oral hemangioma with sclerotherapy: case report

Hemangiomas are benign neoplasms that are common in the head and neck, but relatively rare in the oral cavity. They can cause esthetic and functional impairment, depending on location. The most common site is the upper lip, but they can occur in other areas, such as the tongue, buccal mucosa and palate. Treatment is primarily dependent on correct diagnosis of the lesion and on its anatomic location. The purpose of this article is to provide a description of a case of a hemangioma on the upper lip, treated by therapeutic sclerosis with monoethanolamine oleate (Ethamolin  ), covering clinical characteristics and methods for diagnosing these lesions. Precise diagnosis and appropriate therapeutic management resulted in satisfactory esthetic and functional results, with total regression of the lesion and no signs of relapse at 1-year follow-up.


INTRODUCTION
In 1982, Mulliken and Glowacki 1 proposed a classification system for vascular lesions based on the cellular method, dividing these lesions into two types.The first type exhibits endothelial proliferation (hemangioma), with rapid growth, followed by gradual involution, meaning that 90% of cases resolve themselves before 9 years of age, and 5 to 10% occur in children up to 1 year old. 2 The second type does not exhibit proliferation of the endothelium (vascular malformation), is present at birth and remains throughout life, affecting around 0.3 to 1% of newborn infants. 2 A hemangioma is a common and benign neoplasm of the head and neck that relatively rarely lasts beyond 9 years of age.In the oral and perioral region it can cause esthetic and functional impairment, depending on location. 2,3The most common site is the lips, 4 but other areas, such as the tongue, buccal mucosa and palate have also been described. 3,5,6Peak incidence is described soon after birth or in early infancy; but some cases have onset in adulthood. 2,3,6,7linical definition is a fundamental part of diagnosis, because in cases of extensive involvement, surgery may cause difficult to control transoperative bleeding.Therefore, a combination of detection of medical signs on examination and supplementary test results can provide absolutely conclusive diagnoses in the majority of cases. 8,9linically, hemangiomas present as swellings filled with blood or as red or bluish-purple discolorations that, depending on the depth of the lesion and the localization of the affected tissue, disappear momentarily on digital compression or diascopy.This is the clinical method for establishing diagnosis. 8,9ize is variable, ranging from a few millimeters to several centimeters and may cause facial asymmetry.Physical appearance is as a flat or elevated lesion which may be in the form of a macule, papule, nodule or tumor, is normally pulsatile and has a higher temperature than adjacent tissues.1][12] The objective of this article is to describe a case of a female patient with a hemangioma of the upper lip that was treated with therapeutic sclerosis (monoethanolamine oleate), covering clinical characteristics and diagnostic methods.

DESCRIPTION OF CASE
A 13-year-old brown-skinned female patient (M.E.N.), presented at the oral diagnosis service with a primary complaint of a 'blue-colored lesion' located on the upper lip.
During history taking, the patient reported that she had noticed the lesion more than 2 years previously.She had acquired the habit of biting her lip and had noticed that the size of the lesion increased when she had been crying or bathed in a swimming pool.On physical examination, little facial asymmetry was evident, probably because the patient had very prominent lips (Figure 1).Intraoral physical examination revealed a lesion that was firm on palpation and purple colored, with sessile attachment, smooth skin and intact mucosa (Figure 2).
The lesion was painless and exhibited no other symptoms even when manipulated.During a diascopy test the purple color was observed to fade.Doppler ultrasonography revealed echographic abnormalities in subcutaneous tissue of the upper lip, left of the midline, containing tissue with a hypoechoic echotexture that was discreetly heterogenous, with a regular outline and well-defined limits, measuring 3.0×1.0×1.0 cm in diameter, with discrete dilation of vessels with low resistance flow on Doppler imaging, suggesting a diagnosis of hemangioma (Figure 3).
Once the echographic examination had confirmed the vascular nature of the lesion with slow continuous flow and had identified its location, the decision was taken to employ sclerotherapy with 0.05 g/ mL of monoethanolamine oleate, administered on three occasions via slow infiltration of 2 mL into the center of the lesion with 1 week intervals between applications (Figure 4).
At a 4-month follow-up visit (Figure 5), favorable involution was observed, with localized fibrosis present.Currently, at 1-year follow-up, regression of the tissue fibrosis can be observed and the lesion has reduced significantly in size, in comparison with its initial appearance, with satisfactory esthetic results (Figure 6).

DISCUSSION
Oral hemangiomas are most common in the regions of the lips, tongue and buccal mucosa, presenting as red, purple or violet macules or nodules of variable size, which may be well-delineated or diffuse and are relatively depressible. 3,4,6,8In the case described here, the lesion was located on the left side of the upper lip, with no significant changes to extraoral appearance and discrete volume increase.However, intraorally, there was palpable increased volume and purplish coloration.
][9] According to Neville et al., there is a 3 to 1 preference for females. 2 In contrast, Angelo et al. 7 observed higher prevalence among males at 54%, while Johann et al. 13 observed higher prevalence among females, at 59%.The patient described here was within the age group that Angelo et al. 7 say is most affected (adolescents aged 13 to 18 years).This patient also described having a habit of biting her upper lip, which is possibly the source of the trauma that caused the lesion.
Treatment of hemangiomas is dependent on their location, size and nature (venous or arterial).Therefore, correct diagnosis is of fundamental importance. 2,14In the case described here, the clinical characteristics suggested a diagnosis of hemangioma and were supplemented by the imaging exam (Ultrasound with Doppler).On diascopy, the lesion blanched under glass in response to pressure and reduced in size, as the blood vessels emptied, differentiating it from other lesions, such as cysts and mucocele, which would not have blanched.Although this test can simplify diagnosis greatly, there are certain areas, such as the gingiva and the palate, where the technique is difficult to perform.Supplementary tests such as ultrasonography with Doppler may be needed to determine the nature of the blood supply to the lesion (arterial or venous), and can also aid with diagnosis. 5The ultrasonography examination requested for the case described above confirmed the suspicion of hemangioma.The Doppler study revealed discreetly dilated vessels with low resistance flow and identified the lesion as venous in nature.
Lesions on the face cause esthetic problems and become constant complaints while patients wait for involution of the lesion to take place, which can take a long time, depending on patient response. 14In view of this, several different treatment methods have been employed in attempts to control growth and bring forward regression of hemangiomas, depending on size and site. 2 For smaller and peripheral lesions, treatment options include sclerotherapy, conventional surgical excision, laser treatment, radiotherapy, electrocoagulation and cryotherapy. 3,4,12,15For larger and/or intraosseous, lesions located in areas with esthetic impact, treatment should consist of embolization or obliteration of the lesion and adjacent vessels; indicated with the objective of achieving involution of the lesion for a subsequent surgical procedure. 5,15,16clerotherapy is the safest method, offering partial or total regression of the lesion, facilitating resection in a subsequent surgical intervention, if this proves necessary.In some cases, sclerotherapy may be the definitive treatment, achieving total regression of the lesion.Possible sclerosing agents include sodium morrhuate, sodium psylliate, hypertonic glucose solution, sodium tetradecyl sulphate and ethanolamine oleate. 6,11,12Throughout its history, Oral Medicine has sought procedures that minimize patient morbidity and has found a valuable ally in this type of treatment.
Although sclerotherapy is a simple technique that is apparently free from complications, special precautions must be taken.The sclerosing agent should be administered using an insulin needle, injecting the solution into the middle of the lesion, to avoid necrosis of surrounding tissues. 6,10,11The quantity injected will depend on the dimensions of the lesion, but, as a rule, should not exceed 2 mL.Treatment may involve one or more applications, depending on the extent of the lesion and on the results, which should be evaluated when the next dose is administered, after an interval of 1 to 2 weeks. 6,11,13clerotherapy is contraindicated in uncontrolled diabetic patients and in areas of secondary infection.Administration of monoethanolamine oleate is   contraindicated in expectant mothers, because it can have teratogenic effects.In addition to causing tissue necrosis, injection of volumes greater than the recommended can trigger anaphylactic reactions in patients who are sensitive to the drug. 1

CONCLUSIONS
Vascular injuries in the head and neck are complex pathologies that are unlikely to be resolved if inappropriate treatment is chosen.Sclerotherapy is, without doubt, a feasible treatment method that can effectively resolve this type of vascular neoplasm, providing it is correctly indicated on the basis of its benefits and limitations.In the case described here, administration of the sclerosing agent monoethanolamine oleate provoked rapid and safe involution of the lesion, using a non-surgical method that is more likely to lead to the patient's esthetic recovery.