[Renal cell carcinoma- diagnosis by computed tomography]

Area of Science:

• Urology
• Radiology
• Oncology

Background:

• Renal cell carcinoma (RCC) can manifest as a cystic mass in about 10% of instances.
• Mechanisms include cystic necrosis, intrinsic growth, or origin from a simple renal cyst epithelium.
• Simple renal cysts are common but can be complicated by hemorrhage, infection, or ischemia.

Purpose of the Study:

• To differentiate malignant neoplastic cystic masses (RCC) from non-neoplastic complicated cysts.
• To guide appropriate clinical management based on accurate radiologic evaluation.
• To highlight key imaging features distinguishing benign from malignant cystic renal lesions.

Main Methods:

• Review of radiologic findings in cystic renal masses.
• Evaluation of imaging characteristics such as calcification, density, septations, nodularity, wall thickening, and enhancement.
• Correlation of imaging findings with pathological diagnosis.

Main Results:

• Specific radiologic features are crucial for distinguishing cystic RCC from complicated simple cysts.
• Malignant cystic masses often exhibit features like abnormal density, nodularity, and significant wall thickening or enhancement.
• Benign complicated cysts may show fewer of these aggressive features.

Conclusions:

• Accurate radiologic assessment of cystic renal lesions is vital for patient management.
• Distinguishing cystic renal cell carcinoma from complicated benign cysts impacts treatment decisions, with surgery indicated for RCC.
• Key imaging findings must be carefully evaluated to ensure correct diagnosis and prevent unnecessary interventions for benign conditions.