Dr. Michael Chew @mchew85
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GrepMed Gastroenterology-Hepatology Editor, Academic Hospitalist UC Davis Medical Center Internal Medicine, Yale Gastroenterology Fellow '22
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differential gastroenterology causes algorithm disorders functional gastrointestinal hepatology iron low management workup abdominalpain abuse alcohol biomarkers bowel carcinoid celiac cirrhosis
Gastrointestinal Causes of Iron Deficiency Anemia • Mass lesions: Carcinoma, Large polyps • Inflammatory: Reflux esophagitis,
Causes of Iron Deficiency ... Anemia • Mass ... rubber bleb nevus syndrome ... #Anemia #Causes ... #differential #diagnosis
Gastrointestinal Evaluation of Iron Deficiency Anemia In patients with anemia, diagnose iron deficiency if: • Ferritin <
Evaluation of Iron Deficiency ... Anemia In patients ... with anemia, diagnose ... iron deficiency ... Evaluation #workup #diagnosis
Irritable Bowel Syndrome (IBS) - Pathophysiology, Diagnosis and Management Algorithm Risk factors: Previous acute enteric infection, Female
(IBS) - Pathophysiology ... , Diagnosis and ... factors: Previous acute ... common: Food, Acute ... #Pathophysiology
Causes of Severe Acute Liver Injury - Ichemic hepatitis - Acute biliary obstruction - Drug-Induced liver
Causes of Severe Acute ... hepatitis - Acute ... -1 antitrypsin deficiency ... LiverInjury #Severe #Acute ... Differential #Hepatology #Diagnosis
Carcinoid Syndrome - Pathophysiology, Signs and Symptoms Symptoms: Flushing, diarrhea, palpitations, bronchospasm Complications: Carcinoid heart, mesenteric fibrosis, pellagra,
Carcinoid Syndrome ... - Pathophysiology ... #Carcinoid #Syndrome ... #Pathophysiology ... Signs #Symptoms #Diagnosis
Causes of Low Vitamin B12 Levels Low vitamin B12 intake - Vegetarianism, chronic alcoholism and older people Autoimmune
Autoimmune - Pernicious anaemia ... and Sjögren's syndrome ... Transcobalamin II deficiency ... #VitaminB12 #deficiency ... #differential #diagnosis
Functional Dyspepsia - Pathophysiology, Diagnosis and Management Risk factors: Non-steroidal anti-inflammatory drugs, Psychological comorbidity, Helicobacter pylori infection,
Functional Dyspepsia - Pathophysiology ... , Diagnosis and ... pylori infection, Acute ... months before diagnosis ... Functional #Dyspepsia #Pathophysiology
Gallstone Diseases 1. Asymptomatic Stones 75% 2. Biliary Pain 20% 3. Acute Cholecystitis 10% 4. Mirizzi's Syndrome < 0.1% 5. Cholangitis/
Acute Cholecystitis ... Mirizzi's Syndrome ... Fistula/Bouveret's Syndrome ... #differential #diagnosis
Common Etiologies of Cirrhosis Inflammation - Hepatitis B (15 percent) - Hepatitis C (47 percent) - Schistosomiasis
α1-antitrypsin deficiency ... disease (Budd-Chiari syndrome ... 14 percent) #Diagnosis
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 Non-invasive biomarkers for excessive alcohol use Acute Alcohol Use Biomarkers: - Ethanol - Ethyl Glucuronide (EtG) and
excessive alcohol use Acute ... - Carbohydrate deficient ... abuse #laboratory #diagnosis
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