Peritoneal Multicystic Mesothelioma

Definition 1

A cystic mesothelioma that arises from the peritoneum and usually affects young to middle aged females. Grossly, it presents as a large multiloculated tumor mass, usually in the pelvic peritoneum. Histologically it is characterized by the presence of multiple cysts that are lined by one or more layers of mesothelial cells that do not show atypia. Patients usually present with abdominal or pelvic mass and pain. The clinical course is indolent. The tumor may recur, but transformation to diffuse malignant mesothelioma is rare. (NCI Thesaurus)

Definition 2

A peritoneal mesothelioma affecting mainly young females and producing cysts of variable size and number lined by a single layer of benign mesothelial cells. The disease follows a benign course and is compatible with a normal life expectancy, requiring occasionally partial excision or decompression for relief of pain or other symptoms. Malignant potential is exceptional. (From Holland et al., Cancer Medicine, 3d ed, p1345) (NLM, Medical Subject Headings)

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Peritoneal Mesothelioma

A benign or malignant mesothelial neoplasm that arises from the peritoneum.

Peritoneal Malignant Mesothelioma

An aggressive malignant mesothelioma that arises from the peritoneum. Patients usually present with abdominal pain and ascites.

Peritoneal Macrophage

Mononuclear phagocytes derived from bone marrow precursors but resident in the peritoneum.

Peritoneal Lymph Node

A lymph node located in the peritoneum.

Peritoneal infusion

A method of delivering fluids and drugs directly into the abdominal cavity through a thin tube. Also called intraperitoneal infusion.

Peritoneal Infection

An infectious process affecting the peritoneum.