Hypophosphatasia, Infantile, also known as infantile hypophosphatasia, is related to hypophosphatasia, adult and hypophosphatasia, and has symptoms including apnea, constipation and fever of unknown origin. An important gene associated with Hypophosphatasia, Infantile is ALPL (Alkaline Phosphatase, Biomineralization Associated). The drugs Hydroxyurea and Hops have been mentioned in the context of this disorder. Affiliated tissues include bone and bone marrow, and related phenotypes are low alkaline phosphatase and phosphoethanolaminuria