Intramuscular Extramedullary Plasmacytoma in Gluteus Medius Muscle: A Case Report and Literature Review Shah A1,*, Shah R2, Tyagi R1, Botchu R3 1Department of Radiology, University Hospitals of Leicester, NHS Trust, Infirmary Square, Leicester, LE1 5WW, United Kingdom 2Department of Radiology, University of Nottingham, Queen's Medical Centre, Nottingham, NG7 2UH, United Kingdom 3Department of Radiology, Royal Orthopaedic Hospital, Birmingham, B31 2AP, United Kingdom *Address for Correspondence: Dr. Amit Shah, Leicester Royal Infirmary, Infirmary Square, Leicester, LE1 5WW, United Kingdom. Tel.: +44-300-303-1573, Fax: +44-116-258-8210, E-mail: doctigs@gmail.com
Online published on 14 September, 2015. Abstract Plasmacytomas occur in bone marrow or in extramedullary sites, typically in the head and neck. Intramuscular plasmacytoma is rare and reported occurring in the orbits and upper limbs. We report a rare case of intramuscular extramedullary plasmacytoma (EMP) occurring in the gluteus medius muscle. In this case, an elderly lady with known multiple myeloma, presented with a lump in her right buttock. Subsequent imaging demonstrated a non-specific intramuscular mass in the right gluteus medius. Treatment is traditionally surgical resection plus/or adjuvant chemotherapy or autologous stem cell transplant. Plasmacytoma was considered among the differentials, despite the non-specific imaging features, and atypical location. It allowed for a rapid multi-disciplinary team discussion about the risks and benefits of a biopsy. Unfortunately, the patient died before treatment could be started. The purpose of this report is to remind clinicians to include plasmacytoma as a differential for soft tissue masses, even in atypical locations. We also discuss the relevant imaging features and management of EMPs. Top Keywords Biopsy, diagnosis, differential, multiple myeloma, muscles, neoplasms, plasmacytoma, plasma cell. Top |