Fig. 2From: Non-producer multiple myeloma presenting with acute hyperammonemic encephalopathy: case reportSerum ammonia concentration over the course of disease in relation to therapeutic interventions. Time zero is date of initial presentation. Normal range for ammonia: 8–72 μmol/L. Abbreviations: CyBorD = cyclophosphamide, bortezomib and dexamethasone; DCEP = dexamethasone, cyclophosphamide, etoposide and cisplatinBack to article page