â  the ampulla of vater is commonly located in the posteromeâ­dial wall of the second portion of the duodenum. at times, the ampulla of vater may be found at uncommon sites such as the third and fourth portions of the duodenum, the duodenal bulb and the stomach. we found the ampulla of vater in the pyloric channel in a 44 year old patient who had undergone surgery for acute cholecystitis. an in...

A 20-day-old girl presented with increasing projectile vomiting over a period of one week and progressive weight loss. The diagnosis of hypertrophic pyloric stenosis (HPS) was made by sonography (Length of pyloric channel: 22 mm; muscle thickness: 5 mm). Open standard pyloromyotomy was performed. The postoperative course uneventful. On the 50th postoperative day, the girl was readmitted with pr...

We examined the dopamine (DA) modulation of calcium currents (ICa) that could contribute to the plasticity of the pyloric network in the lobster stomatogastric ganglion. Pyloric somata were voltage-clamped under conditions designed to block voltage-gated Na+, K+, and H currents. Depolarizing steps from -60 mV generated voltage-dependent, inward currents that appeared to originate in electrotoni...

The patterned activity generated by the pyloric circuit in the stomatogastric ganglion of the spiny lobster, Panulirus interruptus, results not only from the synaptic connectivity between the 14 component neurons but also from differences in the intrinsic properties of the neurons. Presumably, differences in the complement and distribution of expressed ion channels endow these neurons with many...

By incision of the pyloric muscle and “plastic” reconstruction of the pyloric channel, pyloroplasty facilitates gastric emptying when the gastric outlet is obstructed either mechanically by ulcer, stenosis, or hypertrophy, or functionally by antropyloric vagotomy. First described by Heineke in 1886 and by Mikulicz in 1888, the Heineke-Mikulicz technique is still considered the principal pylorop...

Kimberly J. Kolkhorst, DO Jeffrey Gill, MD, University of South Florida, Department of Gastroenterology, Tampa, Florida We report the case of a 62-year-old female with a history migraines and non-steroidal anti-inflammatory drug (NSAID) use who presented to the emergency department with epigastric abdominal pain associated with intermittent nausea and vomiting for two months. Initial esophagoga...

A 66-year-old male was admitted with a two-month history of vomiting and weight loss. Endoscopy showed a pyloric obstruction and the patient underwent subtotal gastrectomy with gastro- jejunostomy. The histopathological study of the specimen revealed primary hypertrophic pyloric stenosis without any evidence of duodenal peptic disease. In the adult, this is a rare cause of gastric outlet obstru...