CT and MRI Imaging Manifestations and Pathological Characteristics of Rare Primary Malignant Tumors of The Kidney
Objective To explore the CT and MRI manifestations and pathological features of rare primary malignant tumors of the kidney.Methods CT and MRI imaging data of 22 rare primary malignant tumors of the kidney confirmed by pathology were retrospectively analyzed,and their imaging features were analyzed in relation to their pathological findings.Results Mucinous tubular and spindle cell carcinoma,as well as collecting duct carcinoma,display as circular or irregular lobulated soft tissue with visible cystic degeneration,necrosis,and hemorrhage;Enhanced CT scanning shows mild to moderate progressive enhancement,but the collecting duct carcinoma has blurry boundary and is prone to invading the perirenal and renal sinuses and metastasizing to the renal hilum and retroperitoneal lymph nodes.The multilocular cystic renal cell carcinoma presents as multilocular cystic tumor,with cyst wall and septum of variable thickness,which may be accompanied by mural nodules;The cortical phase of the enhanced CT scan shows obvious enhancement,often in a"fast in and fast out"enhancement pattern.Primary renal lymphoma can present as a solitary or diffuse mass,with isointense signals on plain scans,significantly hyperintense signals on DWI,mild enhancement on contrast-enhanced scans,and may exhibit"vascular floating sign".Primary renal angiosarcoma shows cystic degeneration and necrosis within the tumor,with unclear boundaries;On enhanced scanning,small patches of obvious enhancement can be seen in the cortical phase,while the enhancement size in the venous phase increases and the degree of enhancement decreases.Conclusion Rare primary malignant tumors of the kidney have certain CT and MRI imaging features,and accurate preoperative diagnosis is of great value in guiding the selection of clinical treatment methods.
万方数据
维普
