Abstract
Sarcoidosis is a disease of unknown aetiology in which cytokines such as interleukin 2 (IL-2) are thought to play an important role. We present the case history of a 48 year old man with sarcoidosis who received treatment with high dose IL-2 for metastatic renal cell cancer, following which he developed hypercalcaemia characterised by a raised level of 1,25-dihydroxyvitamin D (1,25-(OH)2-D3), a finding consistent with sarcoidosis associated hypercalcaemia. The increased activity in his sarcoidosis following IL-2 treatment provides direct supportive evidence for the role of IL-2 in the pathogenesis of sarcoidosis.
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