LAUSR

An 88-year-old man is sent to hospital because of a rapid worthening of his general state. A myelogram is obtained following the discovery of hypercalcemia associated with a diminished glomerular filtration rate and the discovery of osteolytic lesions, showing a massive proliferation of plasma cells. The lack of plasma and urine detection of both monoclonal antibodies and immunoglobulin light chains, as well as an immature plasma cell phenotype, suggest the diagnosis of non-secretory multiple myeloma. This article aims to describe the atypical clinical presentation of a rare case of multiple myeloma.