An unusual defect resembling pili bifurcati.
D000293:Adolescent; D000505:Alopecia / Q000473:pathology*; D006197:Hair / Q000648:ultrastructure*; D006801:Humans; D007039:Hypotrichosis / Q000473:pathology*; D008297:Male; D008855:Microscopy, Electron, Scanning; D012536:Scalp Dermatoses / Q000473:pathology*