X-linked ichthyosis X-linked ichthyosis X-linked ichthyosis (XLI) (also known as ") is a skin condition caused by the hereditary deficiency of the steroid sulfatase (STS) enzyme that affects 1 in 2000 to 1 in 6000 males. XLI manifests with dry, scaly skin and is due to deletions or mutations in the "STS" gene. XLI can also occur in the context of larger deletions causing contiguous gene syndromes. Treatment is largely aimed at alleviating the skin symptoms. The term is from the Ancient Greek 'ichthys' meaning 'fish'. The major symptoms of XLI include scaling of the skin, particularly on the neck, trunk, and
Catholic theology of the body virginity, the Christian sacrament of marriage, and derived issues such as faithfulness and contraception. Official Church teaching on the subject was stated in the encyclical "Deus caritas est" ("On Christian Love") from Pope Benedict XVI, promulgated on Christmas, December 25, 2005. Some early Church fathers, like Origen were preoccupied with the body and its impediments. The theology of early Church fathers focused on the body in terms of its origin, condition before the fall of man, and destination and relation to the soul. Questions were raised as to whether the body may impede the soul in its attempt to be