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Bilateral scrotal swelling in a boar

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Bilateral scrotal swelling in a boar

Pierre Thilmant1, Dominique Cassart2, Martine Laitat3 1Centre Provincial Liégeois de Productions Animales - 5, Rue de St-Rémy - 4601 Argenteau – Belgium 2Pathology - 3Swine clinic - Faculty of Veterinary Medicine - University of Liège - 4000 Liège - Belgium

History

Clinical examination

 May: history reports a period of hyperthermia, anorexia, depression and weight loss  antibiotic (lincomycin and ceftiofur) + anti-inflammatory (steroid)  recovery  July: the boar fell down after a supervised natural mating

 August: the boar presents a bilateral swelling of the scrotum

 The boar has a good general condition and a normal appetite

 Scrotal palpation is painless - the left hemiscrotum is more enlarged than the right one

 Hematoma  Hydrocele

 (Peri-)orchitis, epididymitis (Aujeszky disease virus, Brucella suis,…)  Scirrhous cord (after castration)

 Scrotal hernia  Testicular neoplasia

 Serology: negative result for Aujeszky disease/brucellosis/chlamydiosis  Ultrasonography: multiple hypoechogenic cavities around testes

 Semen analysis: azoospermia

 Necropsy: kystic structures (serous fluid) surrounded by an abondant fibrous connective tissue  Histopathology: lymphocytes/hemosiderophages around the kysts + hyperplasia of interstitial

tissue in detriment to seminiferous tubules + no sign of spermatogenesis in testis

Laboratory investigations

August: a 3-year-old Landrace boar is referred to the Swine clinic

Normal scrotum of a 2-year-old boar

Examination (clinical case)

Differential diagnosis of scrotal swelling (most likely causes)

Testis (T) and tail of epididymis (E)

T

E

Hydrocele (H) and testis (T)

T H

Diagnosis

Abondant fibrous connective tissue Left

testis

Bilateral scrotal swelling with a traumatic origin: observed lesions seem to be the result of a partial resorption of a complex extratesticular hematoma

Ultrasonography (clinical case) Necropsy (in October)

Necropsy (in October)

Bilateral swelling of the scrotum Bilateral swelling of the scrotum

Ultrasonography of a normal boar

Examination of a normal boar Examination (clinical case)

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