Etoposide-Associated Severe Rhabdomyolysis in a Patient with Diffuse Large B-Cell Lymphoma: A case report and review of the literature.

Rhabdomyolysis is a clinical syndrome characterised by skeletal muscle necrosis with subsequent release of intracellular constituents into the circulation. Although multifactorial in aetiology, chemotherapeutic agents, including etoposide, are rarely implicated. We report a 62-year-old male who presented to a tertiary care hospital in Muscat, Oman, in 2023 with severe rhabdomyolysis and advanced-stage diffuse large B-cell lymphoma following the first cycle of R-CEOP chemotherapy. Extensive evaluation excluded infectious, inflammatory and structural neuromuscular aetiologies. Work-up for metabolic myopathy suggested, but did not confirm, multiple acyl-CoA dehydrogenase deficiency. The patient's clinical course was complicated by acute kidney injury necessitating dialysis, followed by gradual renal and neuromuscular recovery. This report underscores the importance of maintaining clinical vigilance for rhabdomyolysis as a potential complication of etoposide-containing regimens, and the need for early recognition and supportive management.