Testis descends at 8 months into (DBC June 2012)
|A||Superficial inguinal ring|
|D||Deep inguinal ring|
a. The term undescended testicle (cryptorchidism) refers to the interruption of the normal descent of the testis into the scrotum.
b. The testicle may reside in the retroperineum, in the internal inguinal ring, in the inguinal canal, or even at the external ring.
c. The testicle begins as a thickening on the urogenital ridge in the fifth to sixth week of embryologic life.
d. In the seventh and eighth months the testicle descends along the inguinal canal into the upper scrotum, and with its progress the processus vaginalis is formed and pulled along with the migrating testicle.
f. A distinction should be made between the undescended testicle and the ectopic testicle.
g. By definition, an ectopic testis is one that has passed through the external ring in the normal pathway, and then has come to rest in an abnormal location overlying the rectus abdominis or external oblique muscle, the soft tissue of the medial thigh, or behind the scrotum in the perineum.
h. A congenitally absent testicle results from failure of normal development or an intrauterine accident leading to loss of blood supply to the developing testicle.