Testis & paratestis

Nonneoplastic lesions


Last author update: 1 December 2012
Last staff update: 22 November 2022 (update in progress)

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PubMed Search: Hematocele [title] testicular

Sean R. Williamson, M.D.
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Cite this page: Williamson S. Hydrocele. PathologyOutlines.com website. https://www.pathologyoutlines.com/topic/testishydrocele.html. Accessed December 6th, 2022.
Definition / general
  • Accumulation of clear serous fluid between visceral and parietal layers of tunica vaginalis; associated with trauma and epididymitis
  • Diagnose by transillumination
  • Note: take sufficient sections to rule out malignant mesothelioma
Microscopic (histologic) description
  • Loose connective tissue with mesothelial lining
  • If long standing, may have chronic inflammatory infiltrate, fibrosis, squamous metaplasia
Differential diagnosis
  • Spermatocele: epithelial lining, often with cilia, lumen contains spermatozoa
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