Ptosis, Hereditary Congenital 2, also known as ptosis, x-linked, is related to ptosis and ptosis, hereditary congenital 1. An important gene associated with Ptosis, Hereditary Congenital 2 is PTOS2 (Ptosis, Hereditary Congenital 2). Affiliated tissues include skin, and related phenotypes are ptosis and compensatory chin elevation