<unk>  is extremely rare, with less than 64 cases reported since 1968. It is more common in young or adolescent females.<unk>  is mainly seen in emotionally disturbed or mentally disturbed young females. The first known case dates back to a 16-year-old boy in 1779; this was eventually published by Vaughan et al. in 1968. Of the cases reported, the typical age range affected from this syndrome is between 4 and 19 years of age. There is no specific region that is subject to developing this condition, however of the cases reported all of the women came from countries where women traditionally had long hair. Women are more subject to this disorder because naturally women often have longer hair than men. There is only 1 reported male case of<unk> , but he was eating his sister's hair and not his own.
Rapunzel syndrome
Pretzel syndrome
Nezelof syndrome
Beare–Stevenson cutis gyrata syndrome
Van Wyk and Grumbach syndrome
Johnson–McMillin syndrome
Franceschetti–Klein syndrome
Irlen syndrome