Osseous Meningioma -A Case Report

• Published in: Orthopedics & Traumatology Vol. 42; no. 4; pp. 1587 - 1590
• Main Authors: Teramoto, Hiroshi, Nagata, Takami, Taniwaki, Kouichi, Kiya, Hiroaki, Yuge, Takao, Ochi, Ryuuya
• Format: Journal Article
• Language: English
• Published: West-Japanese Society of Orthopedics & Traumatology 1993
• Subjects: direct tumor sign; meningioma; osseous
• ISSN: 0037-1033; 1349-4333
• DOI: 10.5035/nishiseisai.42.1587

Meningioma is well known to develop histologic calcification and ossification. However, these lesions are seldom revealled radiographically. We report a case with ossification evident radiographically such that the tumor shadow was confirmed by a simple roentgenogram. A 70-year-old woman on admission had good to fair MMT in both lower extremities and slight spastic paralysis and rigidity. Sensory disturbance was observed at Th4 and lower. On MRI, a mass lesion which was slightly enhanced by Gd-DTPA with low density on T1 and T2, was found in the vertebral canal at the level of C7. A round tumor-like shadow was also found at the same position by simple X-ray analysis. The tumor was extirpated and found to be thumb sized, spheroidal, bony hard and gray matter. Most of the tumor consisted of bone trabeculae, although whorl formation and psammoma bodies were observed in some of the tissue leading to the diagnosis of osseous meningioma.