A Rare Case of Primary Gastric Melanoma

Abstract Primary melanomas in the gastrointestinal tract are extremely rare, with an estimated prevalence of 0.5 to 1 case per million. Primary mucosal melanomas of gastric origin account for approximately 1–3% of all primary melanomas in the gastrointestinal tract. We present the case of a patient who underwent surgery due to primary gastric melanoma

Effectiveness and safety of sleeve gastrectomy and adjustable gastric banding in morbidly obese patients single centre study

Introduction: This retrospective study aimed to compare short- and long-term outcomes between laparoscopicsleeve gastrectomy (SG) and laparoscopic adjustable gastric banding (LAGB). Material and methods: This retrospective one-centre study included patients who underwent bariatricsurgery in the form of LAGB and SG. Results: %BMIL was significantly higher in the SG group than in the LAGB group during postoperativefollow-up months (p < 0.001). LAGB patients had a lower %EWL compared to SG at each postoperativefollow-up month (p < 0.05). After LAGB, 25.0% patients had %EW ≥ 50%; in the LSG group, 44.8% patients achieved %EWL ≥ 50% (p < 0.0001). The LAGB group’s %EWL ≥ 50 was dependent on BMI before operation (p = 0.049). There are no postoperative complications after LAGB. A total of 221 patients in the SG group 6 (2.7%) had postoperative surgical complications within 30 days after surgery. Postoperative complications in the long term were significantly higher for LAGB than for LSG (p = 0.0062). Reoperation was performed in 16 (7%) patients after LAGB compared to 2 (0.9%) patients after LSG. Conclusions: LSG is a more effective procedure than LAGB, contributing to greater improvement of weightloss. LAGB is associated with lower surgery-related complications in the early postoperative period,but long-term outcomes contributing to a higher late complication rate led to a higher reoperation ratethan SG procedure

Impact of Weight Loss Due to Sleeve Gastrectomy on Shear Stress of the Femoral Vein in Morbid Obesity

BACKGROUND: Studies have shown that obesity is associated with venous flow disturbances that lead to changes of the biomechanical forces on the venous wall known as shear stress. We hypothesized that weight loss due to bariatric surgery affects the venous hemodynamics and biomechanical forces on the venous wall. The aim of this study was to evaluate the effects of laparoscopic sleeve gastrectomy (LSG) on the wall shear stress (WSS) and the venous hemodynamics of the femoral vein. METHODS: We studied ten morbidly obese patients who underwent LSG. We investigated venous hemodynamics before, 6 and 12 months after LSG. The femoral vein diameter, cross-sectional area, peak (PeakV) and maximum (TA(max)) velocities, WSS, and shear rate (SR) were assessed. RESULTS: PeakV and TA(max) were significantly lower in the obese patients compared with the control group. WSS and SR were significantly lower in the obese patients compared with the control subjects. Venous hemodynamic parameters increased in the postoperative period at baseline compared with 12 months after surgery: PeakV increased from 17.53 (14.25–20.01) cm/s to 25.1 (20.9–30.1) cm/s (P = 0.04) and the TA(max) from 12.97 (11.51–14.6) cm/s to 18.46 (13.24–24.13) cm/s (P = 0.057). WSS significantly increased from 0.21 (0.19–0.23) Pa at baseline to 0.31 (0.23–0.52) Pa 12 months after surgery (P = 0.031). SR also significantly increased from 47.92 (43.93–58.55) s(−1) at baseline to 76.81 (54.04–109.5) s(−1) 12 months after surgery (P = 0.02). CONCLUSIONS: This study showed that weight loss due to LSG significantly changes the biomechanical forces on the femoral vein generated by blood flow