Disorders of Sexual Development of the Bull

Sex Chromosome DSD

XX DSD

XY DSD

XY SRY+ DSD

XY SRY+ testicular DSD

Segmental aplasia of the mesonephric duct (SAMD)

The usual manifestation of segmental aplasia of the mesonephric duct is an absence of the body and tail of the epididymis. The head of the epididymis is also frequently missing and all that remains is a cystically distended region of the efferent ductules. The increased pressure in the rete testis and mediastinum results in dilation of the structures and testicular atrophy/degeneration. The ampulla of the deferent duct and the vesicular gland on the side of the missing segment are frequently small or missing.

 

 

Williams HJ, Revell SG, Scholes SF, Courtenay AE, Smith RF. (2010) Clinical, ultrasonographic and pathological findings in a bull with segmental aplasia of the mesonephric duct. Reprod Domest Anim. 2010; 45: e212-e216.

 

XY SRY- DSD