title: Laparoscopic and histologic evaluation of the inguinal vanishing testis.
abstract: OBJECTIVE
  Visual inspection of the spermatic cord vessels and vas deferens during laparoscopy now frequently determines further treatment. We set out to explore the implications of atretic spermatic cord vessels and vas deferens entering the inguinal ring, a finding noted on laparoscopic examination in some patients with a nonpalpable testis, and that we refer to as the inguinal vanishing testis.
  
  
  METHODS
  We reviewed our series of 35 patients with nonpalpable testes with regard to the laparoscopic, surgical, and histopathologic findings of the involved gonadal structures.
  
  
  RESULTS
  We noted atretic vessels and vas deferens entering the inguinal ring in 14 patients in this series. All 14 patients underwent open inguinal exploration. Histopathologic findings revealed fibrosis and hemosiderin deposits alone in 13 patients. One specimen had a microscopic focus of residual seminiferous tubules. No specimen contained dysgenetic gonadal tissue.
  
  
  CONCLUSIONS
  We submit that patients with inguinal vanishing testes do not need to undergo inguinal exploration to remove residual testicular tissue. Only rarely will viable seminiferous tubules be found, so the risk of malignant degeneration is remote. The histopathologic findings suggest that the inguinal vanishing testis occurs secondary to a vascular accident in utero or in the neonatal period.
authors.affiliation: Department of Pediatric Urology, Children's Hospital and Regional Medical Center, Seattle, Washington 98105, USA.
authors.forename: R W
authors.initials: RW
authors.lastname: Grady
authors.forename: M E
authors.initials: ME
authors.lastname: Mitchell
authors.forename: M C
authors.initials: MC
authors.lastname: Carr
mesh_terms: D003456:Cryptorchidism / Q000473:pathology*; D006801:Humans; D007223:Infant; D010535:Laparoscopy; D008297:Male; D012671:Seminiferous Tubules / Q000473:pathology