title: Torsion of an undescended testis located in the inguinal canal.
abstract: BACKGROUND
  Torsion of undescended testis located within the inguinal canal is a rare finding in the emergency department (ED). This diagnosis can present as undifferentiated abdominal or groin pain, and a full genitourinary examination is essential to making this diagnosis.
  
  
  OBJECTIVE
  We present this case to increase awareness among emergency physicians regarding torsion of undescended testis.
  
  
  METHODS
  A 5-year-old boy presented to the ED with abdominal pain and a mass in his right groin. Physical examination and Doppler ultrasound were used to diagnose torsion of undescended testis.
  
  
  CONCLUSIONS
  In a patient with undescended testis, torsion must be considered as a cause of abdominal or groin pain. Full genitourinary examination is essential to making this diagnosis.
authors: Department of Emergency Medicine, University of Iowa Hospitals and Clinics, Iowa City, Iowa 52242, USA.
authors: Andrew P
authors: AP
authors: Weiss
authors: Jon
authors: J
authors: Van Heukelom
mesh_terms: D015746:Abdominal Pain / Q000175:diagnosis; D002675:Child, Preschool; D003456:Cryptorchidism / Q000150:complications*; D003937:Diagnosis, Differential; D006801:Humans; D008297:Male; D013086:Spermatic Cord Torsion / Q000175:diagnosis*