Clinically, melanocytic matricoma appears as a solitary pigmented papule, usually less than 1 cm in diameter. The lesion usually arises on sun-damaged skin, such as the face, scalp, or neck. The back, hand, and forearm are also reported sites. These tumors are generally asymptomatic, but they can sometimes cause discomfort or tenderness.
There are a few reported cases of malignant melanocytic matricoma, all in individuals in the 8th decade or older, and these have a propensity for the head and neck.
D49.9 – Neoplasm of unspecified behavior of unspecified site
816971006 – Melanocytic matricoma
Differential Diagnosis & Pitfalls