脊柱原发性骨肿瘤CT和MRI观察

目的：了解脊柱肿瘤的CT和MRI表现特征。资料与方法：分析49例脊柱肿瘤的CT和MRI表现，包括成骨细胞瘤、骨髓瘤和骨肉瘤各2例，动脉瘤样骨囊肿（ABC）3例，血管瘤和淋巴瘤各5例，骨巨细胞瘤多位于椎体，呈溶骨性破坏；成骨细胞瘤和骨肉瘤CT呈骨性密度，MRI信号较低，后者伴软组织肿块；22例脊索瘤伴骶前包块，11／16例CT上出现钙化，9例在T2WI有条状低信号纤维结构和高信号粘液基质。骨髓瘤（1例）、淋巴瘤在T1WI和T2WI分别呈略低信号和较高信号，1例骨髓瘤在T2WI呈高信号。结论；CT和MRI可清楚地显示肿瘤的部位和范围，两者结合，多数肿瘤可以定性。

CT and MRI Observation of Primary Spinal Tumors

Objective To study CT and MRI features of primary spinal tumors. Materials and Methods CT and MRI manifestations in 49 cases with primary spinal tumors were retrospectively analyzed. The lesions included osteoblastoma (n=2), osteosarcoma (n=2), myeloma (n=2), aneurysmal bone cyst (ABC, n=3), hemangioma (n=5), lymphoma (n=5), giant cell tumor (n=7) and chordoma (n=23). Results ABC developed in the posterior annex and displayed fluid fluid levels on T 2WI. Giant cell tumors mainly located in the vertebral bodies, showing signs of osteolytic destruction. Osteoblastoma and osteosarcoma demonstrated bony density on CT scans and low signal on MRI, and the osteosarcoma was accompanied with soft tissue mass. Twenty two cases of chordoma had presacral mass, and showed calcifications on CT scans (11/16). Nine cases of chordoma showed streaky low signal of fibrous structure and high signal of mucous tissue on T 2WI. Five lymphomas and one myeloma displayed slightly low signal and relatively high signal on T 1WI and T 2WI, respectively. The other myeloma showed high signal on T 2WI.Conclusion CT and MRI can clearly display the location and extent of the spinal tumor. Combined CT with MRI, the lesion can be correctly diagnosed in most instances.