Gastroenterology

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Gastroenterology

Gastroenterology focuses on the digestive system, including the esophagus, stomach, intestines, liver, pancreas, and gallbladder.

Appendicitis (Alvarado score, CT vs ultrasound, laparoscopic appendectomy, antibiotics-first APPAC trial, perforation risk)
Barrett's Esophagus (GERD complication, specialized intestinal metaplasia, Prague C&M classification, radiofrequency ablation, surveillance intervals)
Celiac Disease (autoimmune gluten sensitivity, Marsh classification, tTG-IgA)
- Serology: tTG, DGP, EMA
- HLA-DQ2 / DQ8 Genetic Testing
- Endoscopy, Biopsy & Marsh Staging
- Gluten-Free Diet Practical Guide
- Non-Celiac Gluten Sensitivity
- Refractory Celiac & EATL
- Nutritional Deficiencies & Bone Health
- Associated Autoimmune Conditions
Crohn's Disease (transmural inflammation, skip lesions, biologic therapy)
Diverticulitis (diverticulosis, complicated vs uncomplicated, Hinchey classification)
Fatty Liver Disease (MASLD) (MASLD/MASH nomenclature 2023, FIB-4 score, fibrosis staging, GLP-1 agonists, resmetirom, lifestyle reversal)
Gallbladder Disease (cholelithiasis, cholecystitis, Tokyo guidelines, HIDA scan)
Gallstones (biliary colic, silent stones, when surgery is needed)
Gastritis (erosive vs non-erosive, H. pylori urea breath test, triple therapy, autoimmune pernicious anemia, Correa cascade)
Gastroesophageal Reflux Disease (GERD, Barrett's esophagus, PPI therapy)
Hemorrhoids (internal vs external, grading, fiber, rubber band ligation, red flags)
Inflammatory Bowel Disease (IBD overview, Crohn's vs UC)
- Crohn's vs Ulcerative Colitis: Key Differences
- Diagnostic Workup: Calprotectin, Colonoscopy, MRE
- Biologics: TNF, IL-23 & Integrin Inhibitors
- JAK Inhibitors & S1P Modulators
- Diet: SCD & Mediterranean
- Surgery: Resection, J-Pouch, Ostomy
- Extraintestinal Manifestations
- Fatigue, Anemia & Nutrient Deficiencies
- Pregnancy & IBD
Irritable Bowel Syndrome (Rome IV criteria, IBS subtypes, low-FODMAP diet)
- Rome IV Subtypes (IBS-C/D/M/U)
- Low-FODMAP Diet
- Visceral Hypersensitivity & Brain-Gut Axis
- IBS & SIBO Overlap
- Post-Infectious IBS
- IBS Medications Guide
- Gut-Directed Hypnotherapy & CBT
- Peppermint, Probiotics & Herbals
Achalasia (esophageal motility disorder, myenteric plexus loss, Chicago Classification, POEM, Heller myotomy)
Acute Cholecystitis (gallbladder inflammation, Tokyo Guidelines, laparoscopic cholecystectomy)
Acute Colonic Pseudo-Obstruction (Ogilvie syndrome, neostigmine, colonoscopic decompression)
Autoimmune Hepatitis (ANA/SMA/anti-LKM-1, IAIHG criteria, prednisone + azathioprine, budesonide)
Autoimmune Pancreatitis (IgG4-related, Type 1 vs Type 2, steroid-responsive)
Carcinoid Tumor (neuroendocrine tumor, serotonin, carcinoid syndrome, octreotide)
Cholangitis (Charcot's triad, Reynolds pentad, ERCP, biliary drainage)
Choledocholithiasis (common bile duct stones, ERCP, sphincterotomy)
Cyclic Vomiting Syndrome (episodic emesis, migraine variant, mitochondrial, cannabis)
Eosinophilic Esophagitis (EoE, eosinophilic infiltration, rings/furrows, dupilumab, elimination diet)
Eosinophilic Gastroenteritis (eosinophilic infiltration of GI tract beyond esophagus)
Esophageal Varices (portal hypertension, band ligation, TIPS, beta-blockers)
Functional Dyspepsia (Rome IV, PDS vs EPS, H. pylori eradication, prokinetics)
Gastroparesis (delayed gastric emptying, diabetic vs idiopathic, gastric emptying scan, metoclopramide)
Hirschsprung Disease (congenital aganglionic megacolon, RET mutations, pull-through surgery)
H. pylori (Helicobacter pylori, urea breath test, triple therapy, ulcer link)
Hepatitis A (HAV, fecal-oral transmission, self-limited, fulminant risk in chronic liver disease, vaccination, 2018-2019 outbreak)
Hepatitis B (HBV, perinatal transmission, cccDNA, HBeAg phases, tenofovir/entecavir, HCC risk, vaccination)
Hepatitis C (HCV, direct-acting antivirals, SVR cure, fibrosis, HCC risk, cryoglobulinemia)
Hiatal Hernia (sliding vs paraesophageal, GERD link, strangulation red flags, when surgery is needed)
Ischemic Colitis (colon ischemia, watershed areas, CT colonography, bowel rest)
Lactose Intolerance (lactase deficiency, not a milk allergy, hydrogen breath test, lactase supplements, dairy-free calcium)
Liver Cirrhosis (fibrosis, Child-Pugh/MELD, ascites, varices, HCC risk, portal hypertension)
Mesenteric Ischemia (acute vs chronic, SMA thrombosis/embolus, "intestinal angina")
Microscopic Colitis (collagenous and lymphocytic colitis, watery diarrhea, budesonide)
Pancreatitis (acute and chronic, Ranson criteria, Atlanta classification)
Peptic Ulcer Disease (H. pylori, NSAID-induced, triple therapy, Forrest classification)
Primary Biliary Cholangitis (PBC, AMA, ursodeoxycholic acid, obeticholic acid, pruritus, cholestasis)
Primary Sclerosing Cholangitis (PSC, IBD association, MRCP beading, cholangiocarcinoma risk)
Short Bowel Syndrome (intestinal failure, parenteral nutrition, GLP-2 analogs, teduglutide)
Small Bowel Obstruction (adhesions, hernias, CT diagnosis, nasogastric tube, surgery)
Superior Mesenteric Artery Syndrome (SMA syndrome, duodenal compression, weight loss)
Ulcerative Colitis (mucosal inflammation, aminosalicylates, colectomy)
Whipple's Disease (Tropheryma whipplei, malabsorption, PAS-positive macrophages, doxycycline)
SIBO (small intestinal bacterial overgrowth) — full article plus 8 deep-dive guides on gas subtypes, breath testing, low-FODMAP, elemental diet, rifaximin, herbal antimicrobials, prokinetics & relapse prevention, and root causes

All Gastroenterology Articles A–Z

Every article in this specialty, listed alphabetically.

Gastroenterology

All Gastroenterology Articles A–Z

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