Objective To explore the preoperative diagnosis and treatment of xanthogranulomatous pyelonephritis(XGP). Methods The clinical data of 16 patients with XGP from 1978 to 2003 were retrospectively reviewed, and its clinic symtoms, diagnosis and therapy were discussed in combination with literature review. Results 16 cases of patients with XGP confirmed by histopathological examination recovered well after operation, and did not relapse till now. Conclusion According to medical history, symptom, physical sign, the foam cells in urine and CT examination, XGP could be diagnosed. Sometimes, fine needle aspiration biopsy should be done in order to confirm the diagnosis of XGP. The operation was a major method for treating this disease.

Objective To discuss the effect of preventing postoperative incision fat necrosis by the method of evacuated suture of reducing tension. Methods The method of evacuated suture of reducing tension was used in 158 cases. Age of them was 22～83 years old,mean 52 years old. There were thick fat tissues in the sub-skin of all patients.The fat average thickness was from 4 0～8 0cm.Results The treatment group had 158 cases, of which, lumbar incision had 62 cases, subcostal incision had 5 cases and hypogastric median incision had 91 cases. Among 158 cases,there were 4 cases of incision fat necrosis, 3 cases of incision infection and the others were one-stage healing.The control group had 97 cases. Among them, there were 18 cases of fat necrosis, 4 cases of incision infection and the others are one-stage healing. Conclusions Method of evacuated suture of reducing tension to prevent incision fat necrosis has satisfactory efficacy and worth of clinical popularization and application.