Mucinous neoplasm
Other names	Colloid neoplasm
Micrograph of a mucinous adenocarcinoma of the colon. H&E stain.
Specialty	Oncology

A mucinous neoplasm (also called colloid neoplasm) is an abnormal and excessive growth of tissue ( neoplasia) with associated mucin (a fluid that sometimes resembles thyroid colloid). It arises from epithelial cells that line certain internal organs and skin, and produce mucin (the main component of mucus). 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. ^[1]

When found within the skin, mucinous carcinoma is commonly a round, elevated, reddish, and sometimes ulcerated mass, usually located on the head and neck. ^[2]: 669

• 
  Mucinous carcinoma of the breast: Gross pathology (upper left) of mucinous carcinoma shows gelatinous areas. Histopathology shows clusters or nests of tumor cells floating in pools of extracellular mucin. ^[3]

See also

• Eccrine carcinoma
• Microcystic adnexal carcinoma
• Primary cutaneous adenoid cystic carcinoma
• List of cutaneous conditions
• Pseudomyxoma peritonei

Notes

References

•  This article incorporates public domain material from Dictionary of Cancer Terms. U.S. National Cancer Institute.
• Mucinous carcinoma entry in the public domain NCI Dictionary of Cancer Terms