psammoma


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Related to psammoma: psammoma body

psammoma

[sa′mäm·ə]
(medicine)
A tumor, usually a meningioma, which contains psammoma bodies.
References in periodicals archive ?
In asymptomatic women undergoing routine screening in Seattle, psammoma bodies were seen in conjunction with a variety of benign conditions and sometimes seemed to indicate nothing at all, Dr.
The average age of a woman with psammoma bodies in the Seattle series was 36, with a range of 22-72.
Another group (22) also found that the cytologic findings for the primary cutaneous meningioma were similar to findings characteristic of central nervous system meningioma, with bland nuclei, cellular whorls, and psammoma bodies.
Papillae 5 (19) Pseudo-papillae 9 (35) Psammoma bodies 5 (19) Nuclear grooves 11 (42) Nuclear overlap 13 (50) "Orphan Annie" nuclei 6 (23) Nuclear pseudo-inclusions 9 (35) Nucleoli 9 (35) Hypercellularity 21 (81) Colloid scalloping 17 (65) Eosinophilic cytoplasm 10 (38) Cytologic atypia 18 (69) Nuclear pleomorphism 15 (58) Vascular invasion 1 (4) Mitoses ([greater than or 11 (42) equal to]1 mitosis per 10 HPF) Patients With Biologically Feature Malignant Disease (n = 26), No.
The papillary appearance and the presence of psammoma bodies in ovarian papillary serous cystadenoma or cystadeno-carcinoma may mimic thyroid-type papillary carcinoma.
29) This lesion can be differentiated from PCE by the absence of clear cells, the presence of a stratified lining, and the occasional presence of psammoma bodies.
Furthermore, conventional clear cell RCC seldom forms psammoma bodies, and so, when present, psammomatous calcifications are evidence in favor of an Xp11.
Cartilage is not seen but occasional tumors have psammoma body-like calcifications.
Although the presence of psammoma bodies might suggest certain carcinomas (eg, papillary carcinoma in the thyroid and serous papillary tumors of the female genital tract and peritoneal surface), their presence is not a diagnostic aid in either confirming or excluding a diagnosis of mesothelioma.
Renal cell carcinoma containing the PRCC-TFE3 fusion gene generally demonstrates a more nested architecture containing tumor cells that have less-voluminous cytoplasm with fewer psammoma bodies and fewer hyaline nodules.
Small amounts of luminal mucin and psammoma bodies have also been reported.