Hyperammonemic encephalopathy after omega-loop gastric bypass for obesity: A case report and discussion.

Background: Hyperammonemic encephalopathy is a rare but potentially fatal condition, that can occur after obesity surgery.

Case Report: A 43-year-old Caucasian woman, with history of omega-loop gastric bypass, with hydrops, dyspnoea and severe malnutrition was referred for evaluation. After admission to medical department, she experienced three episodes of coma, and biochemical investigations showed hyperammonemia, hypoalbuminemia and hyperglutaminemia.

Altered body composition in obesity: Prevalence, associated factors and comparison of two methods.

Background & Aims: There is still some uncertainty towards the best method to diagnose the sarcopenic obesity, and specifically, altered body composition. A recent international consensus proposes the association of increased fat mass (FM) with reduced skeletal muscle mass adjusted by weight (SMM/W) (method 1). The ratio of fat mass index (FMI)/fat free mass index (FFMI) (method 2) has also been proposed.