TITLE:
Ossified thoracic spinal meningioma with hematopoiesis: A case report and review of the literature
AUTHORS:
Asuka Taneoka, Tomayoshi Hayashi, Takayuki Matsuo, Kuniko Abe, Naoe Kinoshita, Haruna Yasui, Takafumi Fuchino, Izumi Nagata, Junya Fukuoka
KEYWORDS:
Spinal Cord; Meningioma; Ossification; Extramedullary Hematopoiesis; Spinal Tumor
JOURNAL NAME:
Case Reports in Clinical Medicine,
Vol.2 No.1,
March
22,
2013
ABSTRACT: Meningiomas account for 25% of spinal tumors, and they
are often located in the thoracic spine. The ossified subtype is even rarer,
and those with hematopoiesis are rarely described. The mechanism of bone
formation has not yet been clarified. A case of ossified spinal meningioma with
hematopoiesis occurring in a 78-year-old woman is described. Magnetic resonance
imaging revealed a lesion with a dural tail sign at the T9 level located
dorsal to the spinal cord. Computerized tomography revealed a high density
lesion, as high as the bone signal. Total resection was performed, and the
symptoms improved. Pathological findings revealed many psammoma bodies (PBs),
bone formation, and bone marrow with hematopoiesis. Both PBs and bone seemed to
be based on the same background of calcified structures. This report is the
second dealing with ossified spinal meningioma with hematopoiesis. The hardness
of the tumor can make the operation more difficult, so that the operation
should be performed carefully to avoid injuring the spinal cord.