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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Causes of Small Bowel Bleeding - Differential Diagnosis
Common Causes:
 • Under age 40 years: Inflammatory Bowel
Bowel Bleeding - Differential ... Plummer-Vinson syndrome ... , Inherited syndromes ... SmallBowel #Bleeding #Differential ... Diagnosis #Causes #gastroenterology
Acute Esophageal Necrosis
History: Hematemesis and/or melena (70%), Dysphagia, Epigastric/chest pain, Sepsis
Diagnosis EGD and Biopsy
Differential: Melanosis, Melanoma,
EGD and Biopsy Differential ... Necrosis #black #esophagus ... diagnosis #management #gastroenterology
Eosinophilic Esophagitis (EoE) - Spectrum of Response
Non-response:
 • Histology: Persistent eosinophilia, ≥ 15 eos/hpf
 • Symptoms:
• Histology: Normal ... • Endoscopy: Normal ... esophagus, EREFS ... Response #diagnosis #gastroenterology
Abnormal liver function tests algorithm.
 This figure details the initial response to abnormal liver blood tests.
Abnormal liver function ... initial response to abnormal ... /or suspicious clinical ... presence of metabolic syndrome ... Liver #Enzymes #Differential
Pancreatic cystic lesions (PCLs)
 - classified into simple retention cysts, pseudocysts and cystic neoplasms 
 -
histological and clinical ... lesions #PCLs #gastroenterology ... diagnosis #management #differential
Gastric Intestinal Metaplasia (GIM)
 • GIM is a precancerous, histopathologic change characterized by replacement of normal
replacement of normal ... pylori) gastritis Clinical ... diagnosis #management #gastroenterology
Boerhaave Syndrome on Endoscopy 

Boerhaave Syndrome with complete left wall dehiscence. This one went to surgery
Boerhaave Syndrome ... Boerhaave Syndrome ... #Boerhaave #Syndrome ... #clinical #endoscopy ... #video #EGD #esophagus
Causes of a low fecal elastase
Abnormal pancreatic imaging:
Chronic pancreatitis, Pancreatic tumours including cystic disease, Pancreatic resection,
fecal elastase Abnormal ... Shwachman-Diamond syndrome ... Irritable bowel syndrome ... elastase #low #differential ... diagnosis #causes #gastroenterology
Boerhaave Syndrome on Endoscopy - Pleural Space

Massive Spontaneous Esophageal Perforation (Boerhaave Syndrome) in active COVID 19
Boerhaave Syndrome ... Perforation (Boerhaave Syndrome ... #Boerhaave #Syndrome ... #clinical #endoscopy ... #video #EGD #esophagus
Secondary Causes of Esophageal Eosinophilia (EoE) - Differential Diagnosis
 • Gastroesophageal reflux disease
 • Eosinophilic gastrointestinal
Eosinophilia (EoE) - Differential ... Hypereosinophilic syndrome ... • Hyper-IgE syndrome ... #Eosinophilic #Differential ... Secondary #Causes #gastroenterology