Pili pseudoannulati
Encyclopedia
Pili pseudoannulati is an anomaly of human hair that mimics pili annulati
Pili annulati
Pili annulati is a peculiar disease in which the hair seems banded by alternating segments of light and dark color when seen in reflected light.- References :...

; however, the two differ in that the light bands of pili annulati
Pili annulati
Pili annulati is a peculiar disease in which the hair seems banded by alternating segments of light and dark color when seen in reflected light.- References :...

are caused by internal effects, whereas the bright segments of pili pseudoannulati are caused by reflection and refraction of light by flattened, twisted surfaces of hair.
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