Solitary fibrous tumors (SFTs) are rare mesenchymal neoplasms found areas lining the pleura. First reported in 1931, there have been a total of 55 cases of SFTs of the kidney worldwide. In most cases, SFTs presents with hematuria, flank pain, and enlarging abdominal mass. In this case, we report a case of a patient who underwent a radical nephrectomy to remove an SFTs of the kidney with compression of the vena cava. This case further expands upon the importance of diagnosing and assessing the aggressive clinical behavior of SFTs during treatment and follow up.

Objectives: The relationship between autosomal dominant polycystic kidney disease (ADPKD) and renal cell carcinoma (RCC) is investigated to determine a link that would guide management due to elevated RCC risk. Current literature is inconclusive on this topic. Methods: This study is a retrospective chart review of patients having undergone nephrectomy. Those with pathology and history consistent with ADPKD were reviewed for presence of RCC. Results: The review at this institution revealed RCC in 18% of ADPKD patients who underwent nephrectomy. These rates are significantly higher than those found in the general population, and even greater than those would be expected in patients suffering end-stage renal disease (ESRD). Conclusions: Due to the increased prevalence of RCC in ADPKD, clinicians managing patients with ADPKD should maintain a high index of suspicion. Our data suggest a link between ADPKD and RCC, most likely at the genetic level. In light of this, we feel that further genetic research is needed to potentially discover the link between these two disease processes.

A 61-year-old obese Caucasian male with past medical history of smoking, hypertension, chronic obstructive pulmonary disease (COPD), and sleep apnea presented to the hematology clinic with polycythemia. Despite the newly-diagnosed polycythemia, the patient denied any significant symptoms or history of blood clots. Further evaluation with computerized tomography (CT) and ultrasound showed a large renal mass suspicious for renal cell carcinoma of the right kidney. An incidental abdominal aortic aneurysm (AAA) measuring was also appreciated on imaging. Subsequent histological sections of the tumor showed cell renal cell carcinoma. Though previously reported, the concomitant finding of an AAA with renal cell carcinoma with a normal erythropoietin levels is surprising. Given the surgical complications associated with concomitant conditions with renal cell carcinoma, further investigation into paraneoplastic syndromes secondary to renal cell carcinoma remains open to investigation.