Object removed from the stomach 4.5 kg
“Trichobezoar” is the medical name for a hairball, which occurs as a result of trichophagia – eating one’s own hair. The largest trichobezoar surgically removed from a human was a hairball weighing 4.5 kg (10 lb), found in the stomach of an unnamed 18-year-old woman treated at Rush University Medical Center in Chicago, Illinois, USA, in Nov 2007. The excised trichobezoar measured 37.5 x 17.5 x 17.5 cm (15 x 7 x 7 in).