CT诊断骨样骨瘤的应用价值

Evaluation of CT analysis in the diagnosis of osteoid osteoma

目的分析骨样骨瘤的CT征象,探讨CT的应用价值。方法回顾性分析手术或穿刺并经病理证实的19例骨样骨瘤的临床和CT表现,并与X线检查进行对比;其中男13例,女6例,好发年龄10～20岁。结果发病于股骨干6例,股骨颈和胫骨干各4例,肱骨2例,腓骨、跟骨及腰椎椎板各1例;骨样骨瘤的CT特征为圆形或类圆形的瘤巢及周围的骨质硬化,瘤巢直径0.3～1.8cm,大部分瘤巢内可见形态不一的钙化,病灶位于关节内时关节腔可见积液。结论瘤巢是诊断骨样骨瘤的关键,与X线相比,CT更易发现瘤巢和钙化。

Objective To analyze the CT manifestations and evaluate the clinical value of CT analysis in the diagnosis of osteoid osteoma.Methods：The clinical manifestations and the CT images were analyzed retrospectively in 19 patients（13 men and 6 women,age range always in 10-20 years old） with pathologically confirmed osteoid osteoma.CT analysis of osteoid osteoma was further compared with that from X-ray images.Results：6 cases occurred in the femur diaphysis.4 cases of each occurred in the neck of femur and diaphysis of tibia and 2 occurred in the humerus.There was 1 case each happened in the fibula,calcaneus or lamina of lumbar vertebrae.The characteristic CT manifestation of osteoid osteoma was round or oval tumor nidus with bone sclerosis occurring in the surrounding area.The tumor was usually 0.3-1.8 cm in diameter with various calcifications.Joint effusion was also found if the tumor located in the joint.Conclusions：The key sign for the diagnosis of osteoid osteoma is the tumor nidus.Compared to the X-ray,it is much easier to find tumor and calcification by CT analysis.