Abstract
Hypercalcemia has been described in variety of granulomatous diseases and fungal infections. However, hypercalcemia in pulmonary cryptococcosis is rarely disclosed. We report a 57-year-old HIV-uninfected woman with diabetes, who initially presented with altered mental status, severe hypercalcemia with increased serum 1,25-dihydroxyvitamin D [1,25(OH)₂D] concentration and suppressed parathyroid hormone. Pulmonary cryptococcosis was diagnosed as the cause of hypercalcemia. Successful treatment resulted in the resolution of hypercalcemia and decrease of the serum 1,25(OH₂D concentration to within the normal range. In summary, although HIV infection is a major risk factor for cryptococcosis, vitamin D-mediated hypercalcemia could be the initial presentation of pulmonary cryptococcosis in HIV-negative patients.
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