<prompt> All are canses 0f hypercalcemia, except-ThyrotoxicosisSarcoidosisVitarninAtoxiQityPhenytoin toxicity  <response>: although hyper parathyroidism ,a frequent cause of asymptomatic hypercalcemia, is a chronic disorder in which manifestations may be expressed only after months or years , hypercalcemia may manifest early in malignancy. In patients with sarcoidosis and other granulomatous disease , such as TB, excess 1,25OH2D is synthesized in macrophages or other cells .The usual regulation of active metabolite production by calcium phosphate or PTH does not operate in this patients.PTH level are low and 1,25OH2D level is elevated Vit A is a rare cause and is most commonly a side effect of dietary faddism .Ca level can be elevates into the 3-3.5 mmoll rangeHarrison 17 pg 2387 