Table of ContentsDefinition / general
Cite this page: Williamson S. Anorchia / monorchidism / testicular regression. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/testisanorchia.html. Accessed May 23rd, 2019.
Definition / general
- Absence of one (monorchidism) or both testes
- If phenotypically normal male and vas deferens is present, indicates a testicular regression syndrome caused by infection, trauma, torsion or prenatal hormone induced atrophy due to overproduction of androgens
- A regressed testis is indicated by presence of a nodule of fibrosis, hemosiderin deposition, calcification or Leydig cells, in association with epididymis or proximal vas deferens
- Presence of fat and connective tissue only does not rule out an intra-abdominal testis