Abstract:

Methods The clinical symptoms and signs， imaging findings and postoperative pathological results of one patient with renal SFT complicated with hydronephrosis were collected， the relevant literatures were reviewed，and the clinical characteristics， diagnosis and treatment of the patient with renal SFT complicated with hydronephrosis were summarized. Results A 30-year-old male patient was admitted to the hospital due to a left renal mass with hydronephrosis for 3 d detected by routine physical examination.The abdominal ultrasonography results revealed a left renal mass and left hydronephrosis， with a 2.2 cm separation of light spots in the collecting system； the CT examination results further revealed a left renal space-occupying lesion with hydronephrosis， and the possibility of renal clear cell carcinoma was considered. The preliminary diagnosis was the left renal malignancy， after preoperative preparation， the left transabdominal radical nephrectomy was performed；the postoperative microscope detection results showed that the cell-rich area and the cell-sparse area were alternated， and the spindle cells showed no structural arrangement. Combined with the immunohistochemical staining results ［signal transducer and activator of transcription 6 （STAT6）（+），CD34（+），Vimentin（+），CD99 （partial+）］，the diagnosis of renal SFT was confirmed. The patient recovered well after operation with grade A healing of the incision and was discharged without complications. The CT examination results showed that there was no abnormal manifestation of local recurrence and metastasis 1 month after operation， and no symptoms of discomfort were reported during the follow-up of 3 months after operation. Conclusion Renal SFT has no specific clinical manifestations and can be easily diagnosed as other tumors； the diagnosis mainly depends on the histopathology and immunohistochemical staining results，and currently surgery is still the first option for the treatment of renal SFT. Objective To analyze the clinical manifestations， diagnosis and treatment methods of the patient with renal solitary fibrous tumors （SFT） complicated with hydronephrosis，and to provide the understandings of the clinicians for SFT.

Key words: Solitary fibrous tumor, Kidney, Hydronephrosis, Signal transducer and activator of transcription 6, Hemangiopericytoma