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Image Number 1972 (Melanoma)

Macule brown

Diagnosis: Melanoma

Site: Back

Sex: M

Age: 42


Description: Pigmented macule

Submitted by: Ted Rosen

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Differential Diagnosis


42 year-old referral from primary care physican due to "funny looking" lesion on back. Exam shows clear multiple colors and asymmetry, suggested of melanoma. Lesion excised. 2 of 3 pathologists called it melanoma in situ; one pathologist called it nevus woth severe cytologic atypia and architectural disorder. This highlights the difficulty in pathological interpretation of pigmented lesions. Best to err on the conservative side: assume the worst, as I did with this lesion.

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