A urachal fistula is a congenital disorder caused by the persistence of the allantois (later, urachus), the structure that connects an embryos bladder to the yolk sac. Normally, the urachus closes off to become the median umbilical ligament; however, if it remains open, urine can drain from the bladder to an opening by the umbilicus.This condition is a rare defect, mostly found in children, and is also known as an open or patent urachus. == References ==
Types
Notable cases
Jyoti Amge - Indian actress, worlds shortest woman since her 18th birthday on 16 December 2011
Caroline Crachami – known as the "Sicilian Fairy", displayed in the Hunterian Museum in Scotland
Chandra Bahadur Dangi – smallest man of all time
Nelson de la Rosa – actor linked to the USA baseball team Boston Red Sox
Aditya Dev – worlds smallest bodybuilder
Bridgette Jordan and Brad Jordan – siblings
Khagendra Thapa Magar – worlds shortest man from his 18th birthday on 14 October 2010 to 13 June 2011
Gul Mohammed – former smallest man of all time
He Pingping – worlds shortest ambulatory man until his death in 2010
Weng Weng – Filipino actor and martial artist
Lucía Zárate – Mexican entertainer and first person identified to have MOPD II

See also
Gigantism
Dwarfism
Psychogenic dwarfism
List of people with dwarfism


== References ==