O'Flanagan S J, Stack J P, McGee H M, Dervan P, Hurson B
Cappagh Hospital, Dublin, Republic of Ireland.
J Bone Joint Surg Br. 1991 Nov;73(6):998-1001. doi: 10.1302/0301-620X.73B6.1955451.
The level of bone resection for osteosarcoma depends on the pre-operative evaluation of the extent of intramedullary tumour. We compared the accuracy of magnetic resonance imaging (MRI), computerised tomography (CT), and isotope bone scanning with the actual extent of the tumour in the resected specimens from 34 patients with primary osteosarcoma of a long bone. The extent of medullary tumour was defined accurately in 23 of 24 MRI scans (96%) and 24 of 32 CT scans (75%). A flexion contracture of a joint close to the tumour was an important cause for inaccurate measurements from both MRI and CT scans. Isotope bone scanning was inaccurate: its role is now confined to detecting skeletal metastases and skip lesions.
骨肉瘤的骨切除范围取决于术前对髓内肿瘤范围的评估。我们将磁共振成像（MRI）、计算机断层扫描（CT）和同位素骨扫描的准确性与34例长骨原发性骨肉瘤患者切除标本中肿瘤的实际范围进行了比较。24例MRI扫描中有23例（96%）准确界定了髓内肿瘤范围，32例CT扫描中有24例（75%）准确界定了髓内肿瘤范围。靠近肿瘤的关节屈曲挛缩是MRI和CT扫描测量不准确的重要原因。同位素骨扫描不准确：其作用目前仅限于检测骨转移和跳跃性病变。
