Seaman, W. B. 1971. The case of the missing hair. Hospital Practice 6(9), 146-147.

A 14-year old emotionally disturbed but otherwise asymptomatic girl was noted to have multiple bald spots on her head. Her parents had observed the patient pulling out her hair but denied seeing her swallowing it. ... The foreign body was surgically removed and was found to be a hair cast that outlined the stomach.