[Acute renal failure due to hypercalcemia and peripheral polyneuropathy--rare manifestations of sarcoidosis]. / Akutes Nierenversagen auf dem Boden einer Hyperkalzämie und periphere Polyneuropathie--seltene Manifestationen einer Sarkoidose.

BACKGROUND: Sarcoidosis can involve many organs. Whereas lung and intrathoracal lymph nodes are most often effected, there are some rare manifestations as renal failure and neuropathy. CASE REPORT: A 57-year-old male patient was referred to hospital with dyspnea on exertion, hypercalcemia and acute renal failure after holidays in Southern Europe. The diagnosis of sarcoidosis with the extraordinary manifestations of a nephropathia based on hypercalcemia and a sensitive polyneuropathy was made. CONCLUSION: These findings suggest that an asymptomatic sarcoidosis can develop hypercalcemia with renal failure by increased ultraviolet exposure. Patients with sarcoidosis should avoid marked exposure to UV light.