Metastatic Clear Cell Renal Cell Carcinoma: The Great Pretender and the Great Dilemma

Metastatic renal cell carcinoma (mRCC) may present with a wide range of clinical pictures. Reportedly, paraneoplastic syndromes are the first sign in 20% of cases and only 15% of cases show the classic triad (flank pain, gross hematuria, and palpable abdominal mass) at presentation. The remaining cases present with signs and symptoms related to the site of distant metastases. These data may explain the reason why about 20-30% of patients are metastatic at presentation. We report the case of a 63-year-old woman who came to our attention for lower back pain. After imaging studies, we detected a left kidney mass of 86 × 61 × 79 mm, multiple right pulmonary nodules and six bone lesions. She underwent left radical nephrectomy. After 1 month, she developed signs of spinal cord compression with neurological deficits and she underwent emergency spinal decompression. In order to allow complete motor recovery, the subsequent stereotactic body radiation therapy was not performed, and she is currently taking combination immunotherapy regimens. Management of mRCC is in a continuous evolution due to availability of new target therapies and the possibility of a multimodal approach with surgical, focal and radiotherapy treatments. However, the ideal treatment algorithm is yet to come. This is why mRCC diagnosis and management are still challenging for the clinicians.