title: Hypercalcemia caused by iatrogenic hypervitaminosis A.
abstract: Vitamin A toxicity produces protean clinical manifestations involving a wide variety of tissues and systems. Hypercalcemia can occasionally be associated with high vitamin A levels, but is rare. In this report we describe a patient who was receiving a commercially prepared enteral feeding formula for 2 years. He developed asymptomatic hypercalcemia and had serum vitamin A levels several fold above normal. Subsequently, a custom-made enteral feed was used which contained negligible amounts of vitamin A. Several months later, vitamin A levels diminished substantially and serum calcium levels returned to normal.
authors.affiliation: Baptist Health System, 840 Montclair Rd, Suite 317, Birmingham, AL 35213, USA. karan.bhalla@bhsala.com
authors.forename: Karan
authors.initials: K
authors.lastname: Bhalla
authors.forename: David M
authors.initials: DM
authors.lastname: Ennis
authors.forename: Elizabeth D
authors.initials: ED
authors.lastname: Ennis
mesh_terms: D000368:Aged; D004750:Enteral Nutrition / Q000009:adverse effects*; D006801:Humans; D006934:Hypercalcemia / Q000097:blood / Q000209:etiology*; D006986:Hypervitaminosis A / Q000097:blood / Q000150:complications*; D007049:Iatrogenic Disease; D008297:Male; D019846:Miller Fisher Syndrome / Q000628:therapy; D014801:Vitamin A / Q000008:administration & dosage / Q000097:blood
chemical_list: D014801:Vitamin A