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Amelanotic Malignant Melanoma: A Case Report
Kunal Karmilkar1, Richard F Norem2
1Anatomy, Edward Via College of Osteopathic Medicine, Louisiana Campus, Monroe, USA.
Cureus
|August 14, 2023
Summary
Amelanotic malignant melanoma (AMM), a rare, non-pigmented skin cancer, is challenging to diagnose clinically. Early detection and treatment, including surgery and immunotherapy, significantly improve outcomes for this aggressive melanoma subtype.
Area of Science:
- Dermatology
- Oncology
Background:
- Amelanotic malignant melanoma (AMM) is a rare skin cancer variant, accounting for 2-8% of all melanomas.
- AMM originates from melanocytes lacking pigment, making clinical diagnosis difficult due to its mimicry of benign lesions.
Observation:
- A case report details a 62-year-old Caucasian male with a rapidly growing amelanotic malignant melanoma on his right lower extremity.
- The patient presented with a painless nodule, right inguinal lymphadenopathy, and pitting edema, despite no systemic signs of malignancy.
- Medical history included basal cell carcinoma, squamous cell carcinoma, and psoriasis, but no prior melanoma.
Findings:
- Pathology confirmed an ulcerated AMM with metastatic deposit in the right inguinal sentinel lymph node.
- The patient received adjuvant immunotherapy, leading to complete cancer cell clearance.
Implications:
- This case underscores the critical need for early diagnosis of amelanotic malignant melanoma.
- Effective management involves prompt surgical excision and appropriate adjuvant therapy to enhance patient prognosis.
- Highlights the diagnostic challenges and successful treatment of this rare melanoma subtype.
