Renal solitary fibrous tumors are rare growths that typically start in the kidney capsule or sinus. These tumors are often found without symptoms, though some patients may experience flank pain or blood in the urine. Doctors use imaging and specific tissue tests, such as STAT6 expression, to identify these masses accurately.
Research shows that complete surgical removal with clear margins leads to favorable outcomes for most patients. However, because these tumors can reappear late, long-term monitoring is necessary. About 10% to 15% of cases may see the tumor return or spread to other parts of the body over time.
While surgery is a primary treatment, there is currently limited data regarding the use of targeted or anti-angiogenic drugs for advanced cases. Because this information comes from a narrative review of case reports, the evidence for advanced treatments is not yet fully established. Patients should work with their doctors to manage long-term follow-up care.
