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organoid

   Also found in: Encyclopedia, Wikipedia 0.03 sec.
organoid /or·ga·noid/ (or´gah-noid)
1. resembling an organ.
2. a structure that resembles an organ.

or·gan·oid (ôrg-noid)
adj.
Resembling an organ.
n.
See organelle.

organoid
[ôr′gənoid]
Etymology: Gk, organon + eidos, form
1  adj, resembling an organ.
2  n, any structure that resembles an organ in appearance or function, specifically an abnormal tumor mass. See also organelle.

organoid [or´gah-noid]
1. resembling an organ.
2. a structure that resembles an organ.

organoid
1. resembling an organ.
2. a structure that resembles an organ.


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Microscopically, the tumor is composed of solid and trabecular sheets of oncocytes arranged in an organoid pattern (figure).
An organoid or trabecular pattern may lead to confusion with high-grade neuroendocrine carcinoma, but clues to diagnosis include numerous tumor-infiltrating lymphocytes and a pushing tumor border configuration.
The relationship of the WHO classification and previous histologic classifications is as follows: type A corresponds to spindle cell type or medullary type thymoma; AB corresponds to mixed type; B1 corresponds to lymphocyte-rich type, lymphocytic type, predominantly cortical type, or organoid type; B2 corresponds to cortical type; B3 corresponds to epithelial type, squamoid type, or atypical thymoma, or well-differentiated thymic carcinoma; and type C corresponds to thymic carcinoma.
 
 
 
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