Simultaneous Epstein Barr Virus and Cytomegalovirus Infection Accompanied by Leiomyomatous Change in a Well-Differentiated Liposarcoma in a Patient With Long-Term Corticosteroid Treatment

Patient. A 59-year-old woman presented with a large tumour of the abdominal wall. She had been taking corticosteroids for severe chronic obstructive pulmonary disease for 15 years. On CT scan the tumour had the characteristics of lipomatous tissue with a dense core. Results. Histology showed a well-differentiated liposarcoma with a core of benign fibroleiomyomatous differentiation. Within the core, a third component was observed, characterized by more pleomorphism and the presence of an inflammatory infiltrate. In this component, immunoperoxidase stains and in situ hybridization demonstrated cytomegalovirus (CMV) and Epstein Barr virus (EBV) infection in large and small cells, respectively. Discussion. Long-term corticosteroid use for pulmonary disease may extend the list of immunosuppressed states associated with the development of leiomyomatous tumours with EBV infection, previously described in AIDS patients and liver transplant recipients. The role of CMV is uncertain.