Imaging of Solid Kidney Tumours in Children

Abstract

Eighteen children aged 6 months to 12 years with 20 solid renal tumours; 13 Wilms' tumours (WT), 2 clear cell sarcomas of the kidney, I malignant rhabdoid tumour of the kidney and 2 cases of bilateral nephroblastomatosis with Wilms' tumour underwent evaluation with US, CT and MR imaging. Contrast-enhanced CT and non-enhanced MR were equal1y accurate in determining the size and origin of the tumour but were unreliable in separation of stages I, II and III. US could only accurately assess the size of the tumours. MR characteristics varied somewhat between WTs and non-WTs but contrast-enhanced MR imaging might be useful for separation of WTs from nephroblastomatosis.

Wilms' tumour in infancy

“…Excretory urography or ultrasonography are not sufficiently sensitive for evaluation of predisposition for WT. Contrast-enhanced computed tomography or magnetic resonance imaging may define the multiple non-enhanced lesions of nephroblastomatosis (12).…”

“…The finding of nephroblastomatosis at histopathologic examination of the surgical specimen should indicate a radiologic follow up in order to reveal malignant transposition. Contrast enhanced magnetic resonance imaging might be most useful for separation of WT from nephroblastomatosis (12). One child had nephroblastomatosis, but as contrast enhanced computed tomography is not always performed, the frequency may be higher.…”

Kernspintomographische Diagnostik benigner und prämaligner abdomineller Tumoren im Kindesalter

“…Hierbei hat sich in den letzten Jahren die MRT als geeignete Modalität etabliert [10,15,21,26]. In der Bildgebung steht die Sonographie an erster Stelle bei der Abklärung von abdominellen Beschwerden und Tumoren.…”

Streptococcus mitis‐infected nephroblastoma. An unusual fine‐needle aspiration diagnosis

“…Although the radiological presentation was suggestive of nephroblastoma, a renal abscess could not be excluded. 3 The patient was referred for FNA.…”

“…3 Following the SIOP 4 recommendations, neoadjuvant chemotherapy is administered without any cyto-or histopathological documentation if the clinical and radiological presentations are typical. 1,3 However, some nephroblastomas may also be revealed by an intrarenal mass associated with fever and biological inflammatory signs, and may be difficult to differentiate from a renal abscess. In these circumstances, FNA is indicated.…”