[Value of the assay of urinary neopterin in multiple myeloma. Preliminary study].

Urinary neopterin was assayed by HPLC (high performance liquid chromatography). 75 assays were performed in a population of 21 patients with multiple myeloma. There was a significant correlation between the urinary neopterin level and the electrophoretic peak, the R beta-2 microglobulinaemia ratio and the calculated tumour mass (Tbmc). This study demonstrates the value of this assay in the monitoring of patients with multiple myeloma.