Hypotrichosis Simplex of the Scalp, also known as hereditary hypotrichosis simplex of the scalp, is related to hypotrichosis 2 and hypotrichosis. An important gene associated with Hypotrichosis Simplex of the Scalp is CDSN (Corneodesmosin), and among its related pathways/superpathways is Keratinization. Affiliated tissues include skin, and related phenotypes are fine hair and slow-growing scalp hair