Mucinous neoplasm

A mucinous neoplasm is an abnormal and excessive growth of tissue with associated mucin. It arises from epithelial cells that line certain internal organs and skin, and produce mucin. A malignant mucinous neoplasm is called a mucinous carcinoma. For example, for ovarian mucinous tumors, approximately 75% are benign, 10% are borderline and 15% are malignant.

Mucinous carcinoma

Over 40 percent of all mucinous carcinomas are colorectal.
When found within the skin, mucinous carcinoma is commonly a round, elevated, reddish, and sometimes ulcerated mass, usually located on the head and neck.