He later died of melanoma." Sore that looks like a diabetic ulcer Keeping an eye out for a brown or black vertical line under a toenail is key as it may look like an injury. Even if you have had ...

Subungual melanoma describes a form of malignancy that develops in the cells under the fingernail or toenail. When carcinogenesis takes place in cells that contain skin pigments or melanocytes ...