Cyst of the canal of nuck in a two year old girl.

The canal of Nuck is analogous to a patent processus vaginalis in a male, which normally loses its communication to the peritoneal cavity within the first year of life. Failure of obliteration of this tract can result in a hydrocele. We present a rare case of a 2-year-old girl with left-sided groin swelling, diagnosed as inguinal hernia. Patient underwent surgical exploration and establishes definitive diagnosis as cyst of the canal of Nuck.