Abstract #1181995: A rare case of humoral hypercalcemia of malignancy caused by a Gallbladder Adenocarcinoma

Humoral hypercalcemia of malignancy (HHM) is a common paraneoplastic syndrome occurring secondary to oversecretion of parathyroid hormone-related peptide (PTHrP). It is usually seen in solid tumors particularly squamous cell carcinoma of the head, neck, and lungs. Gallbladder adenocarcinoma is an unusual cause of HHM. We present a rare case of hypercalcemia secondary to elevated PTHrP secretion in a patient with gallbladder adenocarcinoma.