Penile melanosis is a benign condition that causes dark patches of skin to appear on the penis. Learn about its appearance and more in this article.

Melanosis coli causes a dark brown mucosal pigmentation in the proximal colon, which refers to the beginning portion of the large intestine that connects to the small intestine and the middle ...

[3] Multiple Congenital Melanocytic Nevi and Neurocutaneous Melanosis Are Caused by Postzygotic Mutations in Codon 61 of NRAS. Journal of Investigative Dermatology (2013). Back to "Dermatology" ...

For men, a dark pigmented penile area can be a sign of Penile melanosis. This is usually a benign or harmless condition, which is characterized by small black or dark patches on the penis.