Nephrolithiasis as a presenting feature of chronic sarcoidosis: a prospective study.

Abstract

1. Renal stones may be the presentation of sarcoidosis in 3.6% of cases, but the etiology may go unrecognized for many years in most of them. 2. There are asymptomatic renal stones at presentation in a further 2.7%: pyuria or microscopic haematuria may suggest such an occurrence. 3. Renal calculi appear to be a marker of chronicity, with long term corticosteroid therapy required in most cases. 4. A diagnosis of sarcoidosis should always be considered when patients present with renal calculi of unknown origin.