title: Spontaneous testicular tubular hypoplasia/atrophy in the Göttingen minipig: a retrospective study.
abstract: The aim of this retrospective study was to assess the incidence and severity of tubular atrophy/hypoplasia in the testes of 104 control Göttingen minipigs aged 4.5 to 15 months. The finding was termed "tubular hypoplasia/atrophy" according to published descriptions for the dog. It included different microscopic changes that were considered part of a continuum, namely seminiferous epithelium vacuolation, presence of multinucleated germ cells in the tubular lumen, and decreased numbers (hypospermatogenesis) or absence of germ cells. This retrospective study demonstrates that tubular hypoplasia/atrophy is present in more than 70% of Göttingen minipigs and can occur at a marked severity in control animals. It correlated with a higher level of cell debris and a decrease in sperm content in the epididymides and with lower absolute and relative testes weights. There was no correlation with the weight of other sexual organs, total bodyweight, or age, which demonstrates that this change was not related to sexual immaturity. The distinction between this background finding and a compound-related effect could be challenging for the pathologist.
authors.affiliation: Charles River Laboratories, Edinburgh, UK.
authors.forename: Céline
authors.initials: C
authors.lastname: Thuilliez
authors.affiliation: VetAgro Sup, Marcy l'Etoile, France antonin.tortereau@vetagro-sup.fr.
authors.forename: Antonin
authors.initials: A
authors.lastname: Tortereau
authors.affiliation: WIL Research, Saint-Germain sur l'Arbresle, France.
authors.forename: Marie-France
authors.initials: MF
authors.lastname: Perron-Lepage
authors.affiliation: WIL Research, Saint-Germain sur l'Arbresle, France.
authors.forename: Paul
authors.initials: P
authors.lastname: Howroyd
authors.affiliation: Galderma R&D, Sophia Antipolis Cedex, France.
authors.forename: Béatrice
authors.initials: B
authors.lastname: Gauthier
mesh_terms: D000818:Animals; D000830:Animals, Laboratory; D001284:Atrophy; D008297:Male; D012189:Retrospective Studies; D013552:Swine; D013553:Swine Diseases / Q000473:pathology*; D013556:Swine, Miniature; D013733:Testicular Diseases / Q000473:pathology / Q000662:veterinary*; D013737:Testis / Q000473:pathology*
keywords: histopathology.; males; minipigs; testes