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Gastric volvulus
Gastric volvulus: abnormal rotation of the stomach over 180 degrees, organoaxial or mesenteroaxial, causing closed-loop obstruction; Borchardt triad, CT diagnosis, surgical reduction and gastropexy or fundoplication.
Gastrin
Gastrin is a peptide hormone, the second hormone discovered (Edkins, 1905), produced by gastric antrum G cells. It stimulates gastric acid via the CCK2 receptor and ECL-cell histamine; elevated in Zollinger-Ellison syndrome, H. pylori infection, and PPI use.
Gastritis
Gastritis, inflammation of the stomach lining (mucosa), distinct from gastropathy; most often caused by Helicobacter pylori infection, which affects about half the world's population and can lead to ulcers, atrophic gastritis, and stomach cancer.
Gastro-oesophageal reflux disease
Gastro-oesophageal reflux disease (GERD, GORD): chronic condition in which stomach contents reflux into the esophagus causing heartburn, regurgitation, or complications; diagnosed by symptoms, endoscopy, and pH monitoring; treated with PPIs, P-CABs, and antireflux surgery.
Gastrocnemius muscle
Gastrocnemius (musculus gastrocnemius), the superficial two-headed calf muscle; with soleus and plantaris forms the triceps surae. Plantar flexes the ankle, flexes the knee, inserts via the Achilles tendon, innervated by the tibial nerve (S1, S2).
Gastrocnemius recession
Gastrocnemius recession is an orthopedic surgical procedure that lengthens the gastrocnemius aponeurosis to improve ankle dorsiflexion in isolated gastrocnemius tightness, sparing the soleus and Achilles tendon to preserve strength.
Gastroenteritis
Gastroenteritis, also called stomach flu, is inflammation of the stomach and intestinal lining causing vomiting and diarrhea. Main causes are viruses (norovirus, rotavirus), bacteria, and parasites; the chief danger is dehydration, treated with oral rehydration salts and zinc.
Gastroenteritis due to Rotavirus
Gastroenteritis due to Rotavirus (ICD-11 1A22), rotavirus infection causing severe watery diarrhea and vomiting in infants and young children; fecal-oral spread, oral rehydration treatment, prevented by oral vaccines RotaTeq and Rotarix.
Gastroenterologists
Gastroenterologists, also called GI doctors, are internal medicine subspecialists treating digestive disorders from esophagus to rectum, performing endoscopy and colonoscopy, with hepatology as a liver-focused subspecialty.
Gastroenterology
Gastroenterology, also known as gastrointestinal medicine, is the medical specialty covering disorders of the digestive tract, liver, pancreas, and gallbladder, divided into luminal gastroenterology and hepatology and known for endoscopy.
Gastroenterostomy
A gastroenterostomy, including guided gastroenterostomy, is a surgical or endoscopic connection between the stomach and small intestine that bypasses the duodenum to treat gastric outlet obstruction.
Gastroesophageal reflux disease
Gastroesophageal reflux disease (GERD), chronic reflux of gastric contents into the esophagus, affects about 13% of people worldwide; causes heartburn, regurgitation, esophagitis, and Barrett esophagus; treated with PPIs, lifestyle change, and surgery.
Gastrointestinal bleeding
Gastrointestinal bleeding, also called GI hemorrhage, is bleeding anywhere in the digestive tract, a symptom of conditions such as peptic ulcers, diverticular disease, varices, and cancer. Classified upper or lower GI, diagnosed by endoscopy, treated with endoscopic hemostasis, embolization, or surgery.
Gastrointestinal disease
Gastrointestinal disease, also called digestive disease, covers disorders of the GI tract, liver, gallbladder, and pancreas, from GERD and IBS to Crohn's disease and colorectal cancer, diagnosed by endoscopy and managed with guideline-based drug, dietary, and surgical treatment.
Gastrointestinal Endoscopes
Gastrointestinal endoscopes are instruments for visual examination of the GI tract, spanning gastroscopes, colonoscopes, duodenoscopes, and capsule endoscopes; evolved from Kussmaul's 1868 rigid gastroscope through fiberoptic (1957) and video (1983) designs, with reprocessing and AI now central.
Gastrointestinal endoscopy (institution)
Gastrointestinal Endoscopy (GIE), the monthly peer-reviewed journal of the American Society for Gastrointestinal Endoscopy (ASGE), published by Elsevier since 1954; companion journals VideoGIE and iGIE; Editor-in-Chief Douglas G. Adler.
Gastrointestinal Endoscopy (procedure)
Gastrointestinal endoscopy: endoscope-based visualization, biopsy, and treatment of the digestive tract. From Kussmaul's 1868 rigid gastroscope to fiberoptic, CCD video, and capsule endoscopes; over 7.4 million EGDs yearly in the US.
Gastrointestinal intubation
Gastrointestinal intubation is the passage of a flexible tube through the nose or mouth into the stomach or small intestine, used for enteral feeding, medication, or draining gastric contents.
Gastrointestinal perforation
Gastrointestinal perforation, also called bowel or digestive tract perforation, is a full-thickness defect in a hollow GI organ leaking contents into the peritoneum, causing peritonitis; treated with resuscitation, antibiotics, and urgent surgery.
Gastrointestinal stenting
Gastrointestinal stenting is an endoscopic or radiologic procedure in which a self-expanding metal tube holds open a narrowed digestive tract, used mainly to relieve malignant obstruction and, in selected colon cancer, as a bridge to surgery.
Gastrointestinal stromal tumor
Gastrointestinal stromal tumor (GIST) is a sarcoma arising from interstitial cells of Cajal in the GI tract wall, driven by KIT or PDGFRA mutations, diagnosed via CD117/DOG1 staining, and treated with surgery plus imatinib and later TKIs.
Gastrointestinal tract
Gastrointestinal tract (GI tract, digestive tract, alimentary canal): the tube from mouth to anus, mouth, esophagus, stomach, small and large intestine, that digests food, absorbs nutrients, and eliminates waste, aided by liver, pancreas, gallbladder.
Gastrojejunostomy
Gastrojejunostomy is a surgical or endoscopic connection between the stomach and jejunum that bypasses the pylorus and duodenum, used for gastric outlet obstruction from ulcers, pancreatitis, or cancer, and as part of Roux-en-Y gastric bypass.
Gastroparesis
Gastroparesis: chronic delayed gastric emptying without mechanical obstruction, causing nausea, vomiting, and early satiety. Also called diabetic or idiopathic gastroparesis; diagnosed by >10% 4-hour retention on scintigraphy.
Gastropexy
Gastropexy is a surgical procedure that permanently attaches the stomach to the abdominal wall, used in dogs to prevent gastric dilatation–volvulus and in humans for gastric volvulus.
Gastroplasty
Gastroplasty is an operation that partitions the stomach into a small pouch, used for weight loss via Vertical Banded Gastroplasty (VBG) or to lengthen a shortened esophagus.
Gastroptosis
Gastroptosis (gastric prolapse, stomach ptosis), ICD-11 DA40.5: downward displacement of the stomach with the greater curvature below the iliac crest or in the pelvis. Described by Glénard 1833; mainly women 20-50; diagnosed by upright upper GI series; treated with prokinetics, exercises, bandages.
Gastroscopes
Gastroscopes, also called upper endoscopes or EGD scopes, are flexible camera tubes for examining the esophagus, stomach, and duodenum; diameters 4.9–12.8 mm, with single-use and reusable variants compared in recent evidence.
Gastroscopy
Gastroscopy, also called esophagogastroduodenoscopy or EGD, is an endoscopic procedure in which a flexible camera passed through the mouth examines the esophagus, stomach, and upper duodenum.
Gastrostomy
Gastrostomy is the creation of an opening through the abdominal wall into the stomach, most often to place a feeding tube for long-term enteral nutrition in patients with swallowing difficulty.