CT Diagnosis of Rare Primary Renal Malignant Tumors in Children
10.3969/j.issn.1005-5185.2018.03.009
- VernacularTitle:儿童少见肾脏原发恶性肿瘤的CT诊断
- Author:
Juan HUANG
1
;
Shuo LIU
;
Yonggao ZHANG
Author Information
1. 郑州大学第一附属医院放射科
- Keywords:
Kidney neoplasms;
Sarcoma;
clear cell;
Carcinoma;
renal cell;
Neuroblastoma;
Tomography;
X-ray computed;
Diagnosis;
differential;
Child
- From:
Chinese Journal of Medical Imaging
2018;26(3):197-201
- CountryChina
- Language:Chinese
-
Abstract:
Purpose To analyze the CT features of rare primary renal malignant tumors in children, and to improve the understanding and diagnosis of this disease. Materials and Methods The clinical and imaging data of 18 children with rare primary renal malignant tumors confirmed by pathology were retrospectively analyzed. Plain CT scan and enhanced CT scan were performed in all 18 cases, and their CT features were analyzed. Results For 18 patients, 7 cases were clear cell sarcoma of kidney, the mean diameter of tumor was (10.5±3.6) cm. The plain CT scan showed inhomogeneous low density. Most of the tumors were prominent outside the kidney, with 2 cases of small, patchy calcifications. Enhanced CT scan showed mild, moderate and inhomogeneous enhancement in the cortical stage, with varying degrees of necrosis. It could be seen as fish-like. There was stripe-like enhancement and vascular shadow passing through the lesion, which was further enhanced in the parenchymal phase. In 6 cases of renal cell carcinoma, the average diameter of the tumor was (5.5±1.5) cm. The plain CT scan showed the boundary of the renal tissue was clear and the false capsule, with 4 cases of coarse nodular calcification, and there was a low density cystic necrosis area and a slightly higher density bleeding shadow in the tumor. The enhanced CT scan showed mild and moderate inhomogeneous enhancement in the cortical phase of the lesion, and in the parenchymal phase, it could be slightly lower or slightly higher than that in the cortical phase. In the 5 cases of renal neuroblastoma, the average diameter was (13.9±7.7) cm, plain CT scan showed mixed density, with 2 cases of irregular calcification. Enhanced CT scan showed mild enhancement of the cortical phase of the tumor, and small blood vessels around the mass of the tumor. Some were tortuous and thicken, and the degree of enhancement was increased in parenchymal terms. Conclusion Primary renal malignant tumors in children that our team analyzed are relatively rare. In clinic, we should consider the possibility of these kinds of tumors in children with malignant kidney occupying, so as to reduce missed diagnosis and misdiagnosis.
