psammoma bodies


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psammoma bodies

[sa′mäm·ə ‚bäd·ēz]
(pathology)
Laminated calcific spherical structures found in certain benign and malignant tumors.
References in periodicals archive ?
Psammoma bodies were observed on the cyst wall in some areas (Figure 4 a, b).
In addition to the defining characteristic of papillary growth, other helpful features are thick encapsulation; tubular, tubulopapillary, and glomeruloid growth; and presence of mucinous material, foamy macrophages, and psammoma bodies in the fibrovascular core.
Histologically, Psammoma bodies are uncommon in lung adenocarcinoma.
Histologically, the detection of intranuclear groove, pseudoinclusions, and psammoma bodies cause confusion with PTC (7).
In transitional meningioma, common features are noticed, exhibiting different proportions, characteristic both for syncytial and fibroblastic meningiomas, while numerous psammoma bodies are seen in psammomatous meningioma (Figure 3) [15, 44].
However, the intraoperative frozen section not only confirmed the preoperative diagnosis of PTC on the thyroid isthmus, in which disordered and branched papillary structure, scattered psammoma bodies, frosted-glass-like cell nucleus, larger nucleus, nucleus grooves, and intranuclear pseudoinclusions were found (Figure 2(b)), but also showed multifocal papillary thyroid carcinoma (MPTC) in right thyroid lobe as multiple psammoma bodies and papillary structure could be found in it (Figure 2(a)).
Psammoma bodies may be present, but they are not distinguishing features of endometrial serous carcinoma.
(1) The pathognomonic histopathologic feature of the psammomatous type is the presence of spherical ossicles, which are similar to psammoma bodies. (2) PJOF is a slowly progressive lesion with a tendency to invade surrounding and recur after surgical excision.
Psammoma bodies and cytoplasmic yellow bodies were absent.
In histopathology, micro-calcification is thought to represent psammoma bodies, which are 10-100 um round laminar crystalline calcific deposits.