肾嗜酸细胞瘤的CT、MRI诊断

CT and MRI diagnosis of renal oncocytoma

目的探讨肾嗜酸细胞瘤的CT、MRI诊断价值,进一步提高对肾嗜酸细胞瘤的认识。方法回顾分析2例经病理证实的肾嗜酸细胞瘤的CT、MRI表现,并复习相关文献。结果2例均位于骨皮质,边界光滑清楚,突向肾实质外。CT表现为实质密度肿块。中央显状低密度区。MRI T1WI亦表现为软组织密度肿块。中央显状长T1,长T2信号。增强扫描后,病灶呈中度强化,而中央区不强化。结论肾嗜酸细胞瘤是非常少见的肾脏肿瘤,CT、MRI具有相对特征表现。

Objective To discuss the CT and MRI diagnostic value of renal oncocytoma and to improve the recognition of renal oncocytoma. Methods Two cases of renal oncocytoma confirmed by pathology were retrospectively analyzed and related papers were reviewed. Results Two cases were located in renal cortex, with smooth and sharp border, extruding outside of the kidneys. CT showed solid masses with lower density in center area as ＂star＂. On MRI T1WI and T2WI they also showed solid masses with low T1 and high T2 signal inensity in center area as ＂star＂. After contrast enhancement, the masses represented moderate enhancement and the central part did not show enhancement. Conclusion Renal oncocytoma is a kind of rare nephroma provided with some characteristics in CT and MRI.