Keratosis follicularis spinulosa decalvans: a rare cause of scarring alopecia in two young Indian girls.

Keratosis follicularis spinulosa decalvans (KFSD) is an X-linked xenodermatosis characterized by scarring alopecia and follicular hyperkeratosis. This condition mainly affects males with females being carriers and will have milder symptoms. We present two sisters with severe form of KFSD, progressing to scarring alopecia.