Background: Acute tubulointerstitial nephritis (ATIN) is a very rare paraneoplastic manifestation in patients with multiple myeloma (MM). It is an uncommon pattern of renal disease in such patients. Case presentation: We report a case of an 82-year-old male who was admitted with acute kidney injury. https://www.markymarkscott.com/product-category/zoot-comb-system/