Introduction: Robot-assisted partial nephrectomy (RAPN) with different arterial clamping techniques has increasingly been performed to avoid ischemic injury to nephron. However, postoperative renal function remains controversial. We determine the impact of each renal arterial clamping on surgical and renal outcomes after RAPN. Materials and Methods: Patients who underwent RAPN at Siriraj Hospital from 2010 to 2016 were retrospectively reviewed and stratified into 3 cohorts: main-clamp (MAC), selective-clamp, and off-clamp. Results: Main, selective, and off-clamping were performed in 27, 38, and 12, respectively. Median tumor size and Radius, Exophytic or endophytic, Nearness to collecting system or sinus, Anterior or posterior, and Location relative to polar lines (RENAL) score were 3 cm and 7, respectively. Longer operative time was observed in MAC (p = 0.002) although estimated blood loss, transfusion rate, and complication were comparable. Warm ischemia time was not different between cohorts. However, number of patients with prolonged ischemia time in MAC were greater (p ≤ 0.01). All margins were negative. Median postoperative and latest glomerular filtration rate reduction were 3.8 and 5.3 mL/min/1.73 m2, respectively without significant difference between cohorts. On multivariable analysis, hypertension independently associated with reduced renal function preserved (p = 0.03). Median follow-up was 18 months. Conclusions: Our study is the first to report surgical and renal functional outcomes after RAPN in Southeast-Asian population. Based on our experience, clamping techniques does not impact on renal functions and complication rate was low even in small-volume center.
Objective: Improvement of renal function in obstructive uropathy is a main goal of urinary diversion. In cases of failed internal diversion, percutaneous nephros-tomy (PCN) is used to divert urine from the obstructed kidney. PCN also affect on quality of life, particularly having both sides. The objective of this study was to identify a predicting factor associated with improvement of renal function after bilateral PCNs and to avoid performing bilateral PCNs. Materials and Methods: Data of all patients with bilateral hydronephrosis asso-ciated with malignancy who were performed bilateral PCNs in Siriraj Hospital between December 2011 and December 2016 were reviewed and collected. Success with PCN was defined as a serum creatinine less than 2 mg/dl or decreased more than 95% of initial serum creatinine. Results: A total of 240 patients met the criteria. Mean age was 64.6 ± 14.9 years old. Most common organ of malignancy was cervix. Mean initial serum creatinine (iCr) and nadir serum creatinine (nCr) were 7.7 and 1.9 mg/dl, respectively. On multivariate analysis, no significant predicting factors were demonstrated but only iCr tended to have a statistically significant (p = 0.058). From receiver operating characteristics analysis, at cut-off value of iCr 5 mg/dl could demonstrate signifi-cant difference between success and failure (p = 0.027). Sensitivity and specificity were 72.4% and 44.0%, respectively. Conclusion: Only the iCr was more likely to be a predicting factor. At cut-off value of iCr 5 mg/dl, if a patient presented with iCr more than 5 mg/dl and unilateral PCN at dominant side did not improve serum creatinine, performing contralateral PCN might not help.
Immunoglobulin G4-related disease is a systemic disease, recognized as extensive T-lymphocyte and IgG4-positive plasma cells. It can present as inflammatory pseudotumor in various organs. A female 75 years old, diagnosed IgG4-related autoimmune pancreatitis, presented with urinary retention. Pelvic examination showed well-defined, soft tissue mass, bulging from anterior vaginal wall. MRI pelvis demonstrated a huge periurethral mass, size 6.2 × 4.4 × 4.2 cm, encasing the urethra, extending from bladder neck to distal urethra, and mimicking the prostate gland. Tissue biopsy showed compatible with IgG4-related disease. Immunosuppresive drugs were given for few months and the patient could void normally.
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