psammoma


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Related to psammoma: psammoma body

psammoma

 [sah-mo´mah]
a tumor, especially a meningioma, that contains psammoma bodies.

psam·mo·ma

(sa-mō'mă),
Obsolete term for psammomatous meningioma or meningioma.
[psammo- + G. -oma, tumor]

psammoma

/psam·mo·ma/ (sam-o´mah)
1. any tumor containing psammoma bodies.

psammoma

[samō′mə] pl. psammomas, psammomata
Etymology: Gk, psammos, sand, oma, tumor
a neoplasm containing small calcified granules (psammoma bodies) that occurs in the meninges, choroid plexus, pineal body, and ovaries. Also called sand tumor.

psammoma

(1) Psammoma body, see there.  
(2) An obsolete term for any tumour (benign or malignant) with psammoma bodies. 
(3) Psammomatous meningioma, see there. 
(4) Angiolithic sarcoma, see there.

psam·mo·ma

(sa-mō'mă)
Obsolete term for psammomatous meningioma
[psammo- + G. -oma, tumor]
References in periodicals archive ?
As gynecologists, we worry about psammoma bodies, because they are frequently associated with ovarian serous papillary carcinomas as well as other .
The Seattle group was a true screening population, some of whom were later found to have benign conditions that might explain the presence of psammoma bodies: endometrial or endocervical polyps, cervicitis, or pregnancy-related conditions.
The Seattle group represented a true screening population, some of whom were later found to have benign conditions that might explain the presence of psammoma bodies: endometrial or endocervical polyps, cervicitis, or pregnancy-related conditions.
Microscopic changes observed included focal loss of Purkinje cells, occasional microglial clustering, and psammoma bodies.
Differential Diagnosis of Acquired Cystic Disease- Associated Renal Cell Carcinoma ACDRCC CCRCC PRCC Morphology Architecture Papillary, Alveolar, Papillary cribriform, acinar, tubulocystic solid Cytology Eosinophilic, Clear Basophilic or foamy eosinophilic Nuclear grade High Moderate-high Low-high Helpful features Calcium Intratumoral Psammoma oxalate, hemorrhage bodies, cytoplasmic foamy microvacuoles macrophages Immunohistochemistry AMACR + -/focal + CD10 + + + CK7 -/focal - + RCC Ma + + + Molecular Chromosomal gains 3, 7, 17 5q 7, 12, 16, 17, 20 Chromosomal losses 3p (VHL gene: Y 3p25.
Both papillary and medullary thyroid carcinomas show punctuate and peripheral microcalcifications, which appear as shadows only at high resolution[1,11] They result because of calcification of infarcted tips of malignant papillae or intravascular tumor thrombi by psammoma bodies.
No psammoma bodies, nuclear grooving, necrosis or increased mitosis was noted.
El diagnostico de CP se ha definido con base en sus caracteristicas arquitecturales y citologicas: nucleos elongados u ovoides con cromatina palida, montados unos sobre otros, membrana nuclear con contornos irregulares con formacion de hendiduras y seudoinclusiones y presencia de cuerpos de psammoma [2].
About 75% of serous tumors are detected at stage I; in that stage, psammoma bodies are common and there is no clear evidence of invasion, he said.
3) PRCC CCPRCC Morphology Architecture Papillary Papillary, tubulocystic Cytology Basophilic or Clear eosinophilic Nuclear grade Low-high Low Helpful features Psammoma bodies, Subnuclear foamy macrophages vacuoles Immunohistochemistry AMACR + -- CD10 + -- CK7 + + RCC Ma + -- Molecular Chromosomal gains 7, 12, 16, Variable, 17, 20 limited data Chromosomal losses Y Abbreviations: AMACR, [alpha]-methyl-acyl-coenzyme A;CCPRCC, clear cell papillary renal cell carcinoma; CCRCC, clear cell renal cell carcinoma; CK7, cytokeratin 7;PRCC, papillary renal cell carcinoma; RCC Ma, renal cell carcinoma marker; VHL, von Hippel-Lindau; +, positive expression of marker; -, no expression of marker.
Microcalcification on USG is equivalent to psammoma bodies on FNAC/histopathology and is well known as a predictor of papillary carcinoma, the most common malignancy of thyroid.
6) Concentric calcified deposits (Liesegang rings) that resemble psammoma bodies are formed in the amyloid material.