骨样骨瘤99Tcm-MDP SPECT/CT特征

目的 观察骨样骨瘤的⁹⁹Tc^m-MDP SPECT/CT特征。方法 对36例临床疑诊骨样骨瘤患者行⁹⁹Tc^m-MDP SPECT/CT显像，分析其特征；以手术病理或影像学随访结果为诊断标准，评价SPECT/CT显像对骨样骨瘤的诊断价值。结果 36例中，最终确诊28例骨样骨瘤。⁹⁹Tc^m-MDP SPECT/CT诊断骨样骨瘤28例、其他疾病8例，诊断敏感度、特异度和准确率均为100%。28例骨样骨瘤中，骨皮质型8例（8/28，28.57%），骨膜下型4例（4/28，14.29%），松质骨型16例（16/28，57.14%）；17例（17/28，60.71%）病变位于关节囊内，11例（11/28，39.29%）位于关节囊外；⁹⁹Tc^m-MDP SPECT/CT显像均可见双密度征，瘤巢显像剂摄取明显高于周围骨质硬化，并逐渐递减。结论 骨样骨瘤的⁹⁹Tc^m-MDP SPECT/CT表现具有一定特征性，可为诊断及鉴别诊断提供信息。

99Tcm-MDP SPECT/CT features of osteoid osteoma

Objective To observe ⁹⁹Tc^m-MDP SPECT/CT image features of osteoid osteoma. Methods Totally 36 patients with clinically suspected osteoid osteoma underwent ⁹⁹Tc^m-MDP SPECT/CT imaging, and the features of lesions were analyzed. The value of SPECT/CT imaging for diagnosing osteoid osteoma was evaluated taken surgical pathology or imaging follow-up outcomes as criteria. Results Among 36 patients, osteoid osteoma was proved in 28 patients. SPECT/CT imaging correctly diagnosed osteoid osteoma in all 28 cases and other diseases in the rest 8 cases. The sensitivity, specificity and accuracy of SPECT/CT imaging for diagnosing osteoid osteoma were all 100%. Among 28 cases of osteoid osteoma, cortical type, subperiosteal type and cancellous bone type were found in 8 cases (8/28, 28.57%), 4 cases (4/28, 14.29%) and 16 cases (16/28, 57.14%),respectively, while lesions inside the joint capsule were observed in 17 (17/28, 60.71%) cases, outside the joint capsule were observed in 11 cases (11/28, 39.29%). Double density sign were noticed, and the imaging agent uptake of central nests of osteoid osteoma were significantly higher than that of surrounding reactive bones with gradually decreased on ⁹⁹Tc^m-MDP SPECT/CT imaging. Conclusion Osteoid osteoma had certain characteristics on ⁹⁹Tc^m-MDP SPECT/CT images, which could provide information for diagnosis and differential diagnosis.