Psammoma body
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A psammoma body is a round collection of calcium, seen microscopically. The term is derived from the Greek word psammos meaning "sand."
Psammoma bodies are commonly seen in certain tumors such as:
- papillary thyroid carcinoma
- papillary renal cell carcinoma
- serous papillary ovarian adenocarcinoma (cystadenocarcinoma)
- endometrial adenocarcinomas(Papillary serous carcinoma ~3%-4%)
- meningioma
- mesothelioma
Psammoma bodies have a laminar appearance.
The origin of psammoma bodies is controversial, but one theory is that the nidus for their formation is a single necrotic tumor cell, upon which layers upon layers of calcium salt deposits are added.
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Acknowledgement and Attribution Regarding Sources of Content
Some of the initial content on this page may be incorporated in part from copyleft sources in the public domain including wikis such as Wikipedia and AskDrWiki. Drug information for patients came from the The National Library of Medicine. Infectious disease information may have come from the Centers for Disease Control (CDC). Differential Diagnoses are drawn from clinicians as well as an amalgamation of 3 sources: 1.The Disease Database; 2. Kahan, Scott, Smith, Ellen G. In A Page: Signs and Symptoms. Malden, Massachusetts: Blackwell Publishing, 2004:3; 3. Sailer, Christian, Wasner, Susanne. Differential Diagnosis Pocket. Hermosa Beach, CA: Borm Bruckmeir Publishing LLC, 2002:7 .
