Recurrent severe hypercalcemia caused by bone marrow sarcoidosis.

A 71-year-old woman with recurrent severe hypercalcemia was found to have multiple noncaseating granulomas in the bone marrow with low parathyroid hormone levels and high levels of [1,25 dihydroxycholecalciferol] that later decreased to normal levels with the normalization of calcium levels. No organ involvement other than of the bone marrow was detected, and the angiotensin-converting enzyme level was elevated. The diagnosis of bone marrow sarcoidosis is suggested.