First report of a spermatic granuloma and varicocele in a marsupial: A Koala (Phascolarctos cinereus) Case Study
B.K. Schultz a,b,⁎, C. Palmieri b, V. Nicolson c, R. Larkin d, T. Keeley a, M. McGowan b, S.D. Johnston a
a Wildlife Science Unit, School of Agriculture and Food Science, The University of Queensland, Gatton 4343, Australia
b School of Veterinary Science, The University of Queensland, Gatton 4343, Australia
c Dreamworld, Coomera 4209, Australia
d Moggill Koala Hospital, Queensland Department of Environment Heritage, Moggill 4070, Australia
This study reports the first documented clinical case of a spermatic granuloma and varicocele in a marsupial. Initial clinical presentation included gross morphological changes in the left scrotal cord, epididymis and testis. Ultrasonography of the scrotum and spermatic cord, and gross and histopathological examination afterhemicastration , confirmed the condition as a spermatic granuloma affecting the left caput epididymis, with a varicocele in the left proximal spermatic cord, which was causing azoospermia and infertility. Semen quality and serum testosterone secretion following a GnRH challenge was assessed prior to, and following surgery. After hemi-castration, an increase in androgen secretion to within normal reference ranges for the koala was observed with a subsequent increase in semen production and sperm quality resulting in the sire of a pouch young, 12 months later.