Collecting duct carcinoma of the kidney: Imaging observations of a rare tumor

被引:10
作者
Hu, Yuxiao [1 ]
Lu, Guang-Ming [2 ]
Li, Kai [3 ]
Zhang, Long-Jiang [2 ]
Zhu, Hong [1 ]
机构
[1] Nanjing Univ, Jinling Hosp, Dept Nucl Med, Clin Sch,Med Coll, Nanjing 210002, Jiangsu, Peoples R China
[2] Nanjing Univ, Jinling Hosp, Dept Med Imaging, Clin Sch,Med Coll, Nanjing 210002, Jiangsu, Peoples R China
[3] Soochow Univ, Dept Pharmacol, Suzhou 215123, Jiangsu, Peoples R China
关键词
collecting duct carcinoma; computed tomography; kidney; positron emission tomography; RENAL-CELL-CARCINOMA; MAGNETIC-RESONANCE UROGRAPHY; POSITRON-EMISSION-TOMOGRAPHY; UROTHELIAL CARCINOMA; CANCER; HYDRONEPHROSIS; CLASSIFICATION; METASTASES; DIAGNOSIS; ADULTS;
D O I
10.3892/ol.2013.1739
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Collecting duct carcinoma (CDC) is a rare type of renal neoplasm. Early diagnosis is possibly the only factor leading to a prolonged survival for patients with CDC. The purpose of the present study was to characterize the imaging features of CDC and improve its diagnosis. Radiological data of six patients were retrospectively reviewed by three experienced radiologists, including six cases examined with non-contrast computed tomography (CT) scans, five with contrast-enhanced CT scans, one with magnetic resonance urography, one with renal dynamic imaging and two with conventional whole-body F-18-fluorodeoxyglucose (FDG) positron emission tomography (PET)/CT scans. All patients were pathologically confirmed with CDC. In total, seven tumors were detected in the six cases, with a mean size of 5.3 cm. Of the tumors, two were solid and the rest were complex solid and cystic. In addition, six tumors were located in medullary areas and only one tumor was found in the cortical location. Cystic components were observed in five tumors. Weak enhancements were observed in all six tumors examined with contrast-enhanced CT, and heterogeneous enhancements were also observed in the majority of these tumors with the exception of one tumor. Infiltrative growth and expansible growth were found in five and two tumors, respectively. Metastatic lesions were detected in all six patients. On MR urography, the involved kidney exhibited similar imaging observations to the CT scan. Renal dynamic imaging revealed a decreased renal function in the involved kidney and an increased renal function in the contralateral kidney. On PET/CT imaging, a marked uptake of F-18-FDG was found in primary and metastatic lesions. The results of the present study indicated that medullary location, weak and heterogeneous enhancement, infiltrative growth, damage of renal function in the involved kidney and a marked uptake of F-18-FDG are imaging observations commonly identified in patients with CDC. When a renal tumor exhibits these imaging features, CDC may be suggested as a valuable differential diagnosis.
引用
收藏
页码:519 / 524
页数:6
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