Difference between revisions of "Epidermoid cyst of the testis"
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==Microscopic== | ==Microscopic== | ||
Features:<ref name=pmid22458906/> | Features:<ref name=pmid22458906/> | ||
*Cyst lined by squamous epithelium | *Cyst lined by squamous epithelium without significant [[nuclear atypia]]. | ||
*'''No''' adnexal structures. | *'''No''' adnexal structures. | ||
*'''No''' [[intratubular germ cell neoplasia]] in the adjacent seminiferous tubules. | *'''No''' [[intratubular germ cell neoplasia]] in the adjacent seminiferous tubules. | ||
*'''No''' nuclear atypia. | *'''No''' nuclear atypia. | ||
Notes: | |||
*Surround testis usually within normal limits. | |||
*Granulomas may be seen in the context of cyst rupture. | |||
DDx: | DDx: | ||
Revision as of 13:57, 7 September 2015
Epidermoid cyst of the testis is a rare benign lesion of the testis. It is important to differentiate it from a testicular teratoma.
General
- Rare.
- Benign.
Gross
Features:[1]
- Unilocular cyst containing keratineous material with a laminated appearance.
Notes:
- Teratomas are usually multilocular.
- Presence of hair suggests a dermoid cyst.
Microscopic
Features:[1]
- Cyst lined by squamous epithelium without significant nuclear atypia.
- No adnexal structures.
- No intratubular germ cell neoplasia in the adjacent seminiferous tubules.
- No nuclear atypia.
Notes:
- Surround testis usually within normal limits.
- Granulomas may be seen in the context of cyst rupture.
DDx:
- Dermoid cyst - adnexal structures, e.g. sweat glands, hair follicules.
- Teratoma - nuclear atypia, multilocular, mesenchyme elements, ITGCN present.
- Mixed germ cell tumour.