Imaging and pathological features of congenital mesodermal nephroma in children

Objective: TO investigate CT manifestations and pathological features of pediatric congenital mesangial nephroma (CMN). Methods: The clinical data of 8 cases of CMN confirmed by operation and pathology were analyzed retrospectively. Results: All nephroma of eight cases were unilateral, with swelling growth and unclear border with kidney. The lumps were cystic and mixed in density, necrosis and cystic change, four of them had patchy hemorrhagic foci. In contrast-enhanced scanning, eight cases showed heterogeneous enhancement, cystic non enhancement area, tortuous and enhanced vascular shadow in six cases, delayed enhancement and peripheral ring enhancement in eight cases. No calcification or lymph node metastasis was found. Conclusion: Summarizing the specific imaging signs of CMN in children and comparing them with pathology is helpful for the diagnosis of CMN. (authors)