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目的：探讨髂骨原发性淋巴瘤CT、MRI表现特点，以提高对该病的诊断和鉴别诊断能力。方法回顾性分析经手术病理证实或经穿刺细胞学检查的6例髂骨原发性淋巴瘤的CT及MRI影像学表现。结果6例均为单发，6例行CT平扫，2例CT增强检查，CT主要表现为溶骨性骨质破坏4例，浸润性骨质破坏1例，混合性骨质破坏1例，5例周围伴有较大软组织肿块，髋关节受累3例，骶髂关节受累2例，关节间隙保持正常。2例行CT增强扫描均表现为明显不均匀强化。4例行MRI检查，T1WI主要表现为低信号3例，等信号1例，T2WI主要表现为以高信号为主的混杂信号，增强扫描病灶不均匀明显强化。结论髂骨原发性淋巴瘤与其它恶性骨肿瘤鉴别困难，但具有以下特点：全身症状轻、溶骨型骨质破坏伴或不伴骨膜反应及骨皮质增厚、软组织肿块明显而骨质破坏轻微、病变有包绕关节趋势（关节间隙保持正常）。“,”Objective To study the CT and MRI features of primary lymphoma in ilium in order to improve the diagnostic accuracy. Methods The CT and MRI images of 8 cases with primary malignant lymphoma in ilium were reviewed. All cases were conifrmed by operation and pathology. Results All cases with single destruction, 4 cases showed osteolytic destruction, 1 case showed lytic lesion, cortical bone appeared ″tumor tunnel″, which revealed high signal in T2-weighted MR imaging. Soft-tissue masses were mostly unappropriate size associated with little cortical destruction. Extension across joints persisted in normal joint space. Conclusion Primary lym-phoma in ilium is dififcult to differentiate from other tumors. However there are some characters:subclinical, lytic destruction with or without periosteal and endosteal reaction, unappropriate soft-tissue mass associated with little cortical destruction, and extension across joints with normal joint space.