Mucinous Neoplasm
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A mucinous neoplasm (also called colloid neoplasm) is an abnormal and excessive growth of tissue (
neoplasia A neoplasm () is a type of abnormal and excessive growth of tissue. The process that occurs to form or produce a neoplasm is called neoplasia. The growth of a neoplasm is uncoordinated with that of the normal surrounding tissue, and persists ...
) with associated
mucin Mucins () are a family of high molecular weight, heavily glycosylated proteins (glycoconjugates) produced by epithelial tissues in most animals. Mucins' key characteristic is their ability to form gels; therefore they are a key component in most ...
(a fluid that sometimes resembles thyroid colloid). It arises from
epithelial cell Epithelium or epithelial tissue is one of the four basic types of animal tissue, along with connective tissue, muscle tissue and nervous tissue. It is a thin, continuous, protective layer of compactly packed cells with a little intercellula ...
s that line certain
internal organs In biology, an organ is a collection of tissues joined in a structural unit to serve a common function. In the hierarchy of life, an organ lies between tissue and an organ system. Tissues are formed from same type cells to act together in a ...
and skin, and produce mucin (the main component of
mucus Mucus ( ) is a slippery aqueous secretion produced by, and covering, mucous membranes. It is typically produced from cells found in mucous glands, although it may also originate from mixed glands, which contain both serous and mucous cells. It is ...
). A
malignant Malignancy () is the tendency of a medical condition to become progressively worse. Malignancy is most familiar as a characterization of cancer. A ''malignant'' tumor contrasts with a non-cancerous ''benign'' tumor in that a malignancy is not s ...
mucinous neoplasm is called a mucinous carcinoma. For example, for
ovarian mucinous tumor Mucinous tumors are part of the surface epithelial-stromal tumor group of ovarian neoplasms, and account for approximately 36% of all ovarian tumors. Approximately 75% are benign, 10% are borderline and 15% are malignant. Rarely, the tumor is se ...
s, approximately 75% are
benign Malignancy () is the tendency of a medical condition to become progressively worse. Malignancy is most familiar as a characterization of cancer. A ''malignant'' tumor contrasts with a non-cancerous benign tumor, ''benign'' tumor in that a malign ...
, 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. File:Histopathology of mucinous invasive ductal carcinoma of the breast.jpg,
Mucinous carcinoma of the breast Mucinous carcinoma of the breast is a form of mucinous carcinoma and a breast cancer type. Rare cases of this carcinoma have been diagnosed in men (see male breast cancer Male breast cancer (MBC) is a cancer in males that originates in their br ...
: Gross pathology (upper left) of mucinous carcinoma shows gelatinous areas. Histopathology shows clusters or nests of tumor cells floating in pools of extracellular mucin. Topic Completed: 23 February 2021. Minor changes: 23 February 2021


See also

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Eccrine carcinoma Eccrine carcinoma is a rare skin condition characterized by a plaque or nodule on the scalp, trunk, or extremities. It originates from the eccrine sweat glands of the skin, accounting for less than 0.01% of diagnosed cutaneous malignancies. Eccri ...
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Microcystic adnexal carcinoma Microcystic adnexal carcinoma (MAC) is a rare sweat gland cancer, which often appears as a yellow spot or bump in the skin. It usually occurs in the neck or head, although cases have been documented in other areas of the body. Most diagnosis occur ...
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Primary cutaneous adenoid cystic carcinoma Primary or primaries may refer to: Arts, entertainment, and media Music Groups and labels * Primary (band), from Australia * Primary (musician), hip hop musician and record producer from South Korea * Primary Music, Israeli record label Works ...
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List of cutaneous conditions Many skin conditions affect the human integumentary system—the organ system covering the entire surface of the body and composed of skin, hair, nails, and related muscle and glands. The major function of this system is as a barrier against t ...
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Pseudomyxoma peritonei Pseudomyxoma peritonei (PMP) is a clinical condition caused by cancerous cells (mucinous adenocarcinoma) that produce abundant mucin or gelatinous ascites. The tumors cause fibrosis of tissues and impede digestion or organ function, and if left unt ...


Notes


References

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Mucinous carcinoma
entry in the public domain NCI Dictionary of Cancer Terms Epidermal nevi, neoplasms, and cysts {{Epidermal-growth-stub