肾嗜酸粒细胞腺瘤1例报告并文献复习

Renal oncocytoma:a case report and review of the literature

目的研究肾嗜酸细胞腺瘤(RO)的CT表现。方法1例44岁女性经病理组织学证实为RO患者,继X线胸片,腹部彩色多普勒超声及实验室检查后又经腹部CT平扫与增强扫描。RO的CT表现是结合文献复习分析的。结果CT平扫证实,在右肾下极背侧实质内有一大小约2.4cm×2.2cm的低密度区,边缘清楚,边缘密度高于中央密度。增强扫描皮质期,病灶边缘明显强化,中央呈片状轻度强化,实质期病灶边缘密度减低,中心部位强化伴低密度无强化区,肾盂期病灶边缘密度仍较低,对比剂逐渐向中央填充并呈轻度强化伴缩小的低密度区。结论RO虽然具有某些CT强化特征,但确诊需依据穿刺活检或术后病理。

Objective To study the CT findings of renal oncocytoma （RO）. Methods A 44 year-old femal patient with histopatho-logically proved RO underwent abdominal CT scans without and with contrast enhancement after chest radiography,abdominal color Doppler uhrasonography and laboratorial tests.The CT findings of RO before and after administration of contrast medium were analyzed together with review of the literature.Results Plain CT scan demonstrated that there was a hypodense area with well -defined margion and size of 2.4 cm ×2.2 cm in right renal inferior pole back side parenchyma.The density of lesion border was higher than that of lesion center.At cortical nephrographic phase after CT enhanced scan,the lesion border was significantly enhanced,while the lesion center was patchy and slightly enhanced.At tubular nephrographic phase, the density of lesion border was decreased,while lesion center area was enhanced associated with hypodense non-enhanced area.At pyelographic phase,the density of lesion border was still lower,the contrast medium was gradually filled into lesion center which was slight enhancement associated with reduced hypodense area. Conclusion Although RO has some CT enhanced features,yet the definite diagnosis still depends on the percutaneous needle biopsy or postoperative pathology.