Amelanotic vulvar melanoma: a case report.

Area of Science:

• Gynecologic Oncology
• Dermatopathology
• Pediatric Gynecology

Background:

• Primary mucosal melanoma is a rare and aggressive neoplasm.
• The female genital tract is the second most common site for mucosal melanoma.
• Amelanotic melanoma lacks pigment, making diagnosis challenging.

Observation:

• A 14-year-old female presented with vulvar pruritus, pain, and bleeding.
• A 2-cm achromic lesion on the vulva was noted during gynecological evaluation.
• The lesion was initially suspected to be a pyogenic granuloma due to the patient's age.

Findings:

• Histopathological examination confirmed the diagnosis of amelanotic mucosal melanoma.
• Amelanotic mucosal melanoma is characterized by higher aggressiveness and a worse prognosis than cutaneous melanoma.
• Pyogenic granuloma, a common reactive vascular proliferation, predominantly affects young females.

Implications:

• This case underscores the critical need for thorough histopathological evaluation of vulvar lesions in adolescents, even when they mimic benign conditions.
• Early and accurate diagnosis of rare vulvar neoplasms like amelanotic mucosal melanoma is crucial for timely intervention and improved patient outcomes.
• Increased awareness among gynecologists and pathologists regarding rare genital tract melanomas can aid in prompt diagnosis and management.