Extraosseous multiple myeloma mimicking spinal epidural metastasis.
A 42-year-old man presented with a one-month history of upper back pain and a two-week history of progressive spastic paraparesis. Thoracic spinal MRI showed an epidural mass with spinal cord compression at T6-8 but no bony involvement. The patient underwent T6-8 laminectomy for decompression. Lumbosacral MRI and CT scans revealed bony abnormalities on the sacrum and left posterior iliac bone. Immunohistochemical studies confirmed the diagnosis of multiple myeloma (MM). Thus, this patient suffered from extraosseous MM without adjacent bony involvement or distant skeletal involvement.
Department of Neurosurgery, Seoul National University Hospital, Seoul National University College of Medicine, 28 Yeongeon-dong, Jongno-gu 110-744, Seoul, Republic of Korea.
Jong-Myung
JM
Jung
Sang Hoon
SH
Yoon
Seung-Jae
SJ
Hyun
Ki-Jeong
KJ
Kim
Kyoung Un
KU
Park
Kyu-Chang
KC
Wang
Hyun-Jib
HJ
Kim
D000328:Adult; D001859:Bone Neoplasms / Q000175:diagnosis*; D004824:Epidural Space / Q000473:pathology*; D006801:Humans; D007796:Laminectomy; D008279:Magnetic Resonance Imaging; D008297:Male; D009101:Multiple Myeloma / Q000175:diagnosis*; D013122:Spinal Diseases / Q000503:physiopathology*; D014057:Tomography, X-Ray Computed