Beware of the “Blue Nevus”: A Case Report

We report a case of a malignant melanoma clinically mimicking a blue nevus. The patient presented for evaluation of a “seborrheic keratosis” status post cryotherapy that clinically resembled a blue nevus albeit with concerning clinical course prompting biopsy. Histopathologic examination revealed malignant melanoma in association with a melanocytic nevus to include areas resembling tumoral melanosis which likely contributed to clinical presentation. We conclude this report with a brief review on the topic of melanoma masquerading as benign lesions (e.g., blue nevus), underscoring the importance of clinical history and histological examination in the evaluation of this entity.