Pediatric-onset collagenous gastritis – Presents with abdominal pain and severe anemia with an inflamed and/or nodular stomach and normal-appearing colon. There is no known etiology.
Adult-onset collagenous gastritis – Associated with collagenous colitis and presents with voluminous nonbloody diarrhea. Etiology is possibly secondary to autoimmune, infectious, and medication-induced causes.
Esophagogastroduodenoscopy (EGD) is important for diagnosis and to rule out other causes of symptoms.
K52.9 – Noninfective gastroenteritis and colitis, unspecified
711499009 – Collagenous gastritis
- Acute gastroenteritis
- Viral illness
- Inflammatory bowel disease (eg, ulcerative colitis)
- Crohn disease
- Peptic ulcer disease
- Food protein-induced enterocolitis syndrome
- Helicobacter pylori gastritis
- Hepatitis (eg, hepatitis A, B, C)
- Biliary obstruction
- Acute cholecystitis
- Acute pancreatitis
- Chronic pancreatitis
- Pancreatic cancer
- B-cell lymphoma
- Gastric cancer