A woman in her late 80s presented with a 5-month history of a new 2.8-cm blue-black nodule on her left lateral upper back (Figure, A). She reported that the lesion was mildly pruritic. The results of the physical examination were unremarkable and revealed no lymphadenopathy. A full review of systems was notable for unintentional weight loss, loss of appetite, diarrhea, and hair loss. Her history was significant for extensive sun damage, multiple nonmelanoma skin cancers, and a nonulcerated superficial spreading malignant melanoma (Breslow thickness, 0.56 mm) involving the right dorsal forearm in 2001. This lesion was reexcised, and histologic analysis showed no residual melanoma.
Hayes PJ, Malone JC, Brown TS. New Blue-Black Nodule in a Patient With a History of Melanoma. JAMA Dermatol. 2014;150(7):767-768. doi:10.1001/jamadermatol.2013.9405