Objective To improve the diagnosis and tr ea tment level of reno-colic fistula. Methods The clinical data of 6 patients (4 males and 2 females,average age of 37 years) with reno-c olic fistula were analyzed retrospectively.Among them,4 cases had the fistula on the right side and 2,on the left.On etiology,3 cases had nephrolithiasis compli cated with infection;1,nephrolithiasis accompanied by carcinoma of renal pelvis; 1, tuberculosis of kidney; 1,perinephric abscess.There were no typical clinical symptoms in the 6 patients and they underwent retrograde pyelography or antegrad e pyelography for confirmation of diagnosis. Results Sur gical management was carried out in the 6 patients.Among them,1 case underwent n ephrectomy,colectomy and colocolostomy;2,nephrectomy,fistulectomy and repair of the colon;2,pyelolithotomy or ureterolithotomy,fistulectomy and repair of the ki dney and colon;1 case of nephrolithiasis with carcinoma of renal pelvis underwen t exploratory laparotomy and tumor biopsy with no surgery due to severe adhesion of the kidney and colon with the peripheral tissues.Five patients were followed up for 8 months to 9 years (mean,46 months) postoperatively;no surgical complic ation occurred and they had a satisfactory recovery.Only 1 case died of metastas is of tumor 6 months postoperatively. Conclusions Nephro lithiasis complicated with infection is a major cause of reno-colic fistula.Ret rograde pyelography or antegrade pyelography is the most reliable method in the diagnosis of reno-colic fistula.As soon as the diagnosis is made, surgical trea tment should be performed.

Objective To evaluate the value of 18F-FDG PET/CT in tumor staging in patients with pancreatic cancer.Methods A total 77 patients (from June 2010 to August 2015;44 males, 33 females, age range 36-83 years) who underwent 18F-FDG PET/CT examination for pancreatic cancer and confirmed with pathology were enrolled in this retrospective study.All patients had not been treated before the PET/CT scanning and received surgery or biopsy 4 weeks after the scanning.Two-sample t test and ROC curve analysis were used for data analysis.Results 18F-FDG uptake was higher in 94.8%(73/77) of pancreatic lesions than that in normal pancreatic tissue.The range of SUVmax of pancreatic lesions was 2.4-13.4(mean: 6.2±2.4).SUVmax of patients with smaller primary lesion (minor axis≤2.0 cm) was significantly lower than that of larger lesion group (minor axis >2.0 cm;t=-2.661, P<0.05).A total of 46 patients underwent lymph node excision, and the mean number of excised lymph nodes per patient was 13.8±9.2.About 56.5%(26/46)cases with lymph nodes metastases were confirmed with pathology.When the cut-off value of minor axis of regional lymph nodes was 0.45 cm, ROC curve showed that the sensitivity, specificity and AUC were 84.8%(39/46), 65.2%(30/46) and 0.788, respectively.When the cut-off value of SUVmax of regional lymph nodes was 2.05, the sensitivity, specificity and AUC were 54.3%(25/46), 80.4%(37/46) and 0.759, respectively.18F-FDG PET/CT changed 18.2%(14/77)of patients′ treatment plan.Conclusions 18F-FDG PET/CT is a useful tool in pancreatic cancer staging.Though 18F-FDG PET/CT has no significant advantages in N-staging, it really helps to make a more accurate M-staging for clinical decision.