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目的探讨骨母细胞瘤的MRI表现及其诊断价值。方法9例经病理确诊的骨母细胞瘤术前均行MRI检查并对MRI征象进行分析。结果9例中6例为良性,3例为侵袭性。肿瘤起源于脊柱、颅骨、骨盆分别为5例、3例、1例,MRI上主要表现溶骨性膨胀性骨质破坏,骨样组织在T1WI为低或等信号,T2WI可为低、等或高多种信号成分;肿瘤内钙化或骨化T2WI为低信号,T1WI上为等或低信号;周边硬化环T1WI和T2WI上均为低信号;可伴有软组织肿块;增强扫描骨样组织和软组织肿块中度到明显强化,囊变、硬化边不强化。侵袭性骨母细胞瘤边界不清,可侵犯周围组织。结论MRI能较好显示骨母细胞瘤的各种改变,对诊断、手术定位、分期尤其在显示脊髓和脑内继发改变有重要价值。
Objective To investigate the MRI findings of osteoblastoma and its diagnostic value. Methods Nine cases of osteoblastomas diagnosed by pathology were examined by MRI before operation and the signs of MRI were analyzed. Results Of the 9 cases, 6 were benign and 3 were invasive. Tumors originated in the spine, skull and pelvis were 5 cases, 3 cases, 1 case, MRI mainly osteolytic expansion of bone destruction, bone-like tissue in T1WI is low or equal signal, T2WI can be low, and so on or A variety of signal components; in-tumor calcification or ossification T2WI low signal, T1WI is equal or low signal; peripheral sclerosis ring T1WI and T2WI are low signal; may be associated with soft tissue mass; enhanced scanning of bone-like tissue and soft tissue Mass enhancement to the obvious, cystic change, hardening is not enhanced. Invasive osteoblastoma border is unclear, can encroach on the surrounding tissue. Conclusion MRI can better show various changes of osteoblastoma, which has important value in diagnosis, operation location and staging especially in displaying secondary changes in spinal cord and brain.