Cicatricial alopecia is seen in-
Scarring hair loss, also known as cicatricial alopecia, is the loss of hair which is accompanied with scarring. This is in contrast to non scarring hair loss. It can be caused by a diverse group of rare disorders that destroy the hair follicle, replace it with scar tissue, and cause permanent hair loss. Ref Harrison20th edition pg 1234
DLE
Psoriasis
Alopecia areata
Lichen planus
Anatomy of skin