Anorectal problems: etiology of pilonidal sinus.
D000293:Adolescent; D000328:Adult; D001004:Anus Diseases / Q000150:complications; D005260:Female; D006197:Hair; D006801:Humans; D007239:Infections / Q000150:complications; D008297:Male; D010864:Pilonidal Sinus / Q000209:etiology* / Q000601:surgery; D012008:Recurrence