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 ?
1) Histopathologically, PJOF shows the presence of numerous small round ossicles called psammoma bodies in a cellular fibrous stroma.
Caption: Figure 3: Microscopically, diffusely scattered tumor aggregates, extensive fibrosis, marked lymphocytic infiltration with formation of lymphoid follicles, and abundant psammoma bodies (a) were evident against a background of Hashimoto's thyroiditis (b) (Hematoxylin & Eosin stain x40).
Raras variantes histologicas de neurofibroma incluyen cambios epitelioides, musculo esqueletico, glandulas benignas, pseudorosetas, celulas pigmentadas de melanina o cuerpos de psammoma, lo que hace que muchas variantes de neurofibroma se hayan reportado, entre ellos el clasico, el mixoide, el celular, el hialinizado, epitelioide, difuso, paciniano, pigmentado, granular, lipomatoso, con celulas 11 dendriticas, con pseudorosetas y con rabdomiosarcoma.
The presence of psammoma bodies in a cervical cytology smear has long been thought to be associated with gynecologic malignancies, but a retrospective review of 400,000 smears collected during routine screening suggests they may be an incidental finding in an asymptomatic population.
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, he said at the meeting, cosponsored by the American College of Obstetricians and Gynecologists.
Two newer studies, one from Australia and the other from Yale University documented cancer in 5 of 22 patients and 9 of 20 patients, respectively, when Pap smears contained psammoma bodies.
On day 9, more neuronal degeneration, along with psammoma bodies, was seen in the olfactory nucleus; changes in spinal cord were similar to those on day 8.
An occasional amethyst calcification, concentrically laminated, known as a psammoma body, is visible, and clusters of xanthoma cells stuffed with lipid are scattered about.
Helpful features to distinguish these differential diagnoses are the foamy macrophages, psammoma bodies, and glassy hyaline globules that can be associated with PRCC but are not seen in ACD-RCC.
Pathologically, microcalcification is a psammoma body that is comprised of 10-100 [micro]m sized round, laminar, crystalline, calcific deposits which is very specific for thyroid carcinoma and especially for papillary thyroid carcinoma.
Rarely, calcification can occur in these lesions, which can be mistaken for psammoma bodies, especially in fine needle aspirate (FNA) specimens18.