Gastroenterology:

A. Common Gastrointestinal Symptoms

1. Abdominal Pain

   • Source 1 (Mayo Clinic): Abdominal pain: Causes

   • Source 2 (NIH - NIDDK): Symptoms & Causes of Celiac Disease (Includes abdominal pain)

   • Source 3 (WGO): Global Guideline: Abdominal Pain

2. Nausea and Vomiting

   • Source 1 (NIH - NCBI): Clinical Methods: The History, Physical, and Laboratory Examinations (Nausea and Vomiting Chapter)

   • Source 2 (Mayo Clinic): Nausea and Vomiting

   • Source 3 (WGO): Global Guideline: Acute Vomiting in Adults

3. Changes in Bowel Habits

   • Source 1 (Mayo Clinic): Constipation: Symptoms and causes

   • Source 2 (NIH - NIDDK): Irritable Bowel Syndrome

   • Source 3 (WGO): Global Guideline: Acute Diarrhea

4. Heartburn/Reflux

   • Source 1 (Mayo Clinic): Gastroesophageal reflux disease (GERD)

   • Source 2 (NIH - NIDDK): Acid Reflux (GER & GERD) in Adults

5. Acidity (Gastritis)

   • Source 1 (Mayo Clinic): Gastritis: Symptoms and causes

   • Source 2 (NIH - NIDDK): Gastritis

   • Source 3 (WGO): Global Guideline: Helicobacter pylori

6. Difficulty Swallowing (Dysphagia)

   • Source 1 (Mayo Clinic): Dysphagia (difficulty swallowing)

   • Source 2 (NIH - NIDDK): Esophageal Disorders

   • Source 3 (WGO): Global Guideline: Dysphagia

7. Unexplained Weight Loss

   • Source 1 (Mayo Clinic): Unexplained weight loss

   • Source 2 (NIH - NIDDK): Symptoms & Causes of Crohn's Disease (Includes weight loss)

   • Source 3 (ACS): Unexplained Weight Loss as a Symptom of Cancer (American Cancer Society)

8. Indigestion (Dyspepsia)

   • Source 1 (NIH - NIDDK): Indigestion (Dyspepsia): Symptoms & Causes

   • Source 2 (Mayo Clinic): Indigestion (Dyspepsia)

   • Source 3 (WGO): Global Guideline: Functional Dyspepsia

9. Anemia (Related to GI Bleeding/Malabsorption)

   • Source 1 (NIH - NIDDK): Symptoms & Causes of GI Bleeding

   • Source 2 (ACG): Management of Iron Deficiency Anemia (ACG Guideline)

   • Source 3 (WGO): Global Guideline: Celiac Disease (Associated with iron deficiency)

10. Jaundice

    • Source 1 (Mayo Clinic): Alcoholic hepatitis (Jaundice)

    • Source 2 (NIH - NIDDK): Liver Cirrhosis (Common cause of Jaundice)

    • Source 3 (WHO): Hepatitis B and C Fact Sheets (Key causes of liver damage and Jaundice)

B. Common Gastroenterology Procedures:

1. Endoscopy (Upper GI)

   • Source 1 (Mayo Clinic): Upper Endoscopy

   • Source 2 (NIH - NIDDK): Upper GI Endoscopy

   • Source 3 (ACG): Clinical Guidelines for Upper GI Endoscopy

2. Sigmoidoscopy

   • Source 1 (Mayo Clinic): Flexible sigmoidoscopy

   • Source 2 (NIH - NIDDK): Flexible Sigmoidoscopy

   • Source 3 (USPSTF): Screening for Colorectal Cancer (Includes flexible sigmoidoscopy)

3. Colonoscopy

   • Source 1 (NIH - NIDDK): Colonoscopy

   • Source 2 (Mayo Clinic): Colonoscopy

   • Source 3 (ACS): Colorectal Cancer Screening: Colonoscopy (American Cancer Society)

4. ERCP (Endoscopic Retrograde Cholangiopancreatography)

   • Source 1 (NIH - NIDDK): ERCP

   • Source 2 (Mayo Clinic): ERCP

   • Source 3 (ASGE): ERCP for Biliary and Pancreatic Diseases (ASGE Guideline)

5. Fibroscan (Transient Elastography)

   • Source 1 (NIH - MedlinePlus): Elastography (Transient Elastography/Fibroscan)

   • Source 2 (EASL): Clinical Practice Guidelines on Non-Invasive Tests for Evaluation of Liver Disease (European Association for the Study of the Liver)

   • Source 3 (AASLD): Noninvasive Markers of Liver Fibrosis in Adults (American Association for the Study of Liver Diseases)

6. EUS (Endoscopic Ultrasound)

   • Source 1 (Mayo Clinic): Endoscopic ultrasound (EUS)

   • Source 2 (NIH - NCBI): Endoscopic Ultrasound in Clinical Practice

   • Source 3 (ASGE): Endoscopic Ultrasound

7. Capsular Endoscopy

   • Source 1 (Mayo Clinic): Capsule endoscopy

   • Source 2 (NIH - NCBI): Wireless capsule endoscopy: a comprehensive review

   • Source 3 (ASGE): Capsule Endoscopy for the Small Bowel