Fig. 8.

XY DSD, perineal hypospadias. External genitalia of a an affected and b a normal male cat, each in standing position with a catheter placed in the urethra. a The scrotum is bisected due to failure of closure of the prepuce and penile urethra, causing severe hypospadias. The urethra is open along the entire dorsal aspect, and the urethral orifice is directly ventral to the anus (photo courtesy of Peter Jezyk). b The normal cat scrotum is fused along the midline and lies dorsal to the penis and ventral to the anus. Hair surrounding the scrotum and prepuce is darkly pigmented in this cat. c Affected cat, representative testis histology in which all stages of spermatogenesis were identified.