Polyorchidism Presenting with Inguinal Hernia and Hypospadias

Table 1

Functional classification of polyorchidism based on embryonic development (table derived from Thum [5]).

Type I	The supernumerary testis lacks an epididymis and vas. The split-off part of the primordial gonad does not communicate with the mesonephric tubules from which the epididymis develops.
Type II	The supernumerary testis is linked to the regular testis by a common epididymis and shares a common vas with it. The division of the genital ridge occurs in the region where the primordial gonads are attached to the mesonephric ducts, although the latter are not divided.
Type III	The supernumerary testis has its own epididymis but shares the vas with the regular testis.