Chylous ascites (CA) are a rare finding of triglyceride-rich peritoneal fluid within the abdominal cavity. Malignancy, cirrhosis, and trauma after abdominal surgery are the leading causes of CA in adults. Currently, there are no published guidelines on the management of CA. This report describes a case of an 18-year-old female presenting with abdominal pain and distention following median arcuate ligament syndrome (MALS) decompression. A computed tomography (CT) of the abdomen and pelvis showed large-volume ascites with normal hepatic morphology. Paracentesis and ascitic fluid studies were positive for milky fluid rich in triglyceride. Her recent history of MALS decompression revealed the cause of her acute CA to be a postoperative complication from her abdominal surgery. This case highlights the diverse etiology of ascites and the importance of a careful history and physical examination when evaluating adults with ascites.

Metabolites and enzymes involved in the kynurenine pathway (KP) are highly promising targets for cancer treatment, including gastrointestinal tract diseases. Thus, accurate quantification of these compounds in body fluids becomes increasingly important. The aim of this study was the development and validation of the UHPLC-ESI-MS/MS methods for targeted quantification of biologically important KP substrates (tryptophan and nicotinamide) and metabolites(kynurenines) in samples of serum and peritoneal fluid from gastric cancer patients. The serum samples were simply pretreated with trichloroacetic acid to precipitate proteins. The peritoneal fluid was purified by solid-phase extraction before analysis. Validation was carried out for both matrices independently. Analysis of the samples from gastric cancer patients showed different accumulations of tryptophan and its metabolites in different biofluids of the same patient. The protocols will be used for the evaluation of tryptophan and kynurenines in blood and peritoneal fluid to determine correlation with the clinicopathological status of gastric cancer or the disease\'s prognosis.