Epididymis-like inclusion

Epidemiology and Etiology:

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Common sites:

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Gross features:

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Histologic features:

· Size is not helpful (functional and non-functional both 0.2-0.3mm

· Continuous muscle coat around functional epididymis (disputed)

Immunophenotype:

Marker:	Sensitivity:	Specificity:
CD10 (luminal membrane)	All functional epididymis	Most non-functional inclusions also stain

Molecular features:

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Other features:

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References:

· Taylor GP. Pathology of the Pediatric Regio Inguinalis: Mysteries of the Hernia Sac Exposed. Pediatric and Developmental Pathology. 2000;3(6):513-524.

· Cerilli LA, Sotelo-Avila C, Mills SE. Glandular inclusions in hernia sacs: morphologic and immunohistochemical distinction from epididymis and vas deferens. Am J Surg Path 2003;27(4):469-76.