The Editor,

Sir,

Keratosis follicularis spinulosa decalvans (KFSD) is a rare X-linked disorder characterized by diffuse follicular hyperkeratosis, progressive scarring alopecia of scalp, eyebrows, and eyelashes and may be accompanied by photophobia, corneal and conjunctival inflammation and dystrophy, tooth abnormalities, ichthyosiform xerosis, facial erythema, atopic dermatitis, hair disorders and nail dystrophies.