#1697882 "A" Vitamin to Consider: Refractory Hypercalcemia from Vitamin A Toxicity

Vitamin A toxicity in humans is a rare entity, with fewer than ten cases reported annually since 1976. Its diagnosis is challenging due to nonspecific symptoms such as nausea, fatigue, dry skin, and hair loss. This diagnostic difficulty is particularly pertinent in patients with hypercalcemia, where Vitamin A toxicity is seldom considered. We present a case of refractory hypercalcemia in a nonverbal patient, where the diagnosis of Vitamin A toxicity was established through elevated vitamin A levels.