POM4-GI-DISEASES-HO
GASTROINTESTINAL DISEASES
Anatomy and Functions of the Gastrointestinal Tract
Gastrointestinal Tract: Extends from the mouth to the anus.
Main Functions:
Assimilating nutrients
Eliminating waste
Overview of Gastrointestinal Diseases
Characteristics:
Result from abnormalities within or outside the gut.
Vary in severity from mild symptoms to significant long-term effects.
Can be localized to one organ or involve multiple sites.
Classification of GI Diseases
Impaired Digestion and Absorption
Altered Secretion
Altered Gut Transit
Immune Dysregulation
Impaired Gut Blood Flow
Neoplastic Degeneration
Disorders without Obvious Organic Abnormalities
Genetic Influences
Common Symptoms of GI Diseases
Abdominal Pain
Heartburn
Nausea and Vomiting
Altered Bowel Habits
GI Bleeding
Jaundice
Other Symptoms:
Dysphagia
Odynophagia
Chest pain
Weight loss
Anorexia
Fatigue
Hiatal Hernia
Definition: Bulging of the upper part of the stomach through an opening in the diaphragm.
Etiology:
Age-related changes in the diaphragm.
Injury to the area or after certain types of surgery.
Signs and Symptoms:
Heartburn
Regurgitation of food
Acid reflux
Difficulty swallowing
Chest or abdominal pain
Shortness of breath
Vomiting blood or passing black stools (indicating possible GI bleeding).
Clinical Features of Hiatal Hernia
Oral Manifestations:
Dental caries, dry mouth, burning sensation, halitosis.
Treatment Options:
Over-the-counter antacids.
H2-receptor blockers to lower acid production.
Proton pump inhibitors to prevent acid production.
Diverticulitis
Definition: Small, bulging pouches in the lining of the digestive system, primarily in the colon.
Etiology: Related to increased intraluminal pressure leading to mucosal extrusion through weak points in the bowel muscular layer.
Signs and Symptoms:
Constant, localized abdominal pain (often lower left).
Nausea and vomiting.
Fever and abdominal tenderness.
Constipation or diarrhea.
Treatment:
Antibiotics (may not be necessary in very mild cases).
Liquid diet for bowel healing.
Types of Esophageal Cancer
Adenocarcinoma: The most common form.
Squamous Cell Carcinoma: Second most common.
Small Cell Carcinoma: Rare subtype.
Etiology: Factors include GERD, smoking, and obesity.
Signs and Symptoms of Esophageal Cancer
Abdominal pain
Nausea and vomiting
Weight loss
Dark-colored stools
Yellowing of skin and eyes
Clinical Features and Treatment of Esophageal Cancer
Oral Manifestations: Dental erosion, halitosis, oral ulcers.
Treatment Options:
Surgical removal of cancerous tissue.
Stenting via endoscope.
Other options include radiation, chemotherapy, and laser therapy.
Congenital Abnormalities
Esophageal Atresia
Definition: Condition where the esophagus ends in a blind pouch rather than connecting to the stomach.
Etiology: May have genetic components, often associated with other birth defects.
Signs and Symptoms:
Frothy white bubbles in infant's mouth
Coughing or choking when feeding
Blue skin (cyanosis) during feeding
Difficulty breathing
Treatment: Surgery.
Dysphagia Lusoria
Definition: Difficulty in swallowing due to compression by an aberrant right subclavian artery.
Signs and Symptoms: Include choking while eating, feeling of food stuck, persistent drooling, and difficulty in chewing.
Clinical Features: Most patients are asymptomatic.
Treatment: Surgical intervention.
Diffuse Esophageal Spasm
Definition: Characterized by uncoordinated contractions of the esophagus.
Etiology: Defective peristaltic wave propagation.
Signs and Symptoms: Include chest pain, swallowing difficulty, heartburn.
Treatment: Muscle relaxants, calcium channel blockers, and Botox injections.
Gastroesophageal Reflux Disease (GERD)
Definition: A digestive disorder where stomach acids back up into the esophagus.
Etiology: Dysfunction of the sphincter muscle at the esophagus's lower end.
Signs and Symptoms:
Heartburn
Chest pain
Difficulty swallowing
Regurgitation
Lump sensation in throat.
Treatment Options:
Antacids
H2 blockers
Proton pump inhibitors
Prokinetic agents.
Eosinophilic Esophagitis
Definition: A chronic immune disease where eosinophils build up in the esophagus lining.
Etiology: Genetic predisposition.
Signs and Symptoms:
Difficulty swallowing
Food feels stuck
Central chest pain.
Oral Manifestations: Mouth sores and ulceration.
Treatment: No cure, but medications may help alleviate symptoms.
Peptic Ulcer Disease
Definition: Development of painful sores in the stomach lining or duodenum.
Etiology: Commonly caused by H. pylori infection or NSAIDs.
Signs and Symptoms:
Vomiting (possibly blood)
Dark stool
Nausea
Unexplained weight loss.
Treatment Options:
Proton pump inhibitors
H2 blockers
Antibiotics if H. pylori is present.
Gastritis
Definition: Inflammation of the gastric mucosa.
Etiology: Can be due to infection, NSAIDs, or stress.
Signs and Symptoms:
Nausea
Bloating
Vomiting
Loss of appetite.
Treatment Options:
Antacids
Avoiding irritants like spicy foods.
Vitamin B12 for pernicious anemia.
Celiac Disease
Definition: Immune reaction to consuming gluten.
Signs and Symptoms:
Diarrhea
Weight loss
Fatigue
Joint pain
Nerve damage (numbness).
Etiology: Unknown.
Treatment: Strict gluten-free diet.
Tropical Sprue
Definition: Inflammation of intestines affecting nutrient absorption.
Etiology: Infectious agents (e.g., G. Lamblia).
Symptoms:
Abdominal cramps, diarrhea, gas.
Treatment: Broad-spectrum antibiotics and folic acid supplement.
Short Bowel Syndrome
Definition: Body cannot absorb sufficient nutrients due to lack of small intestine.
Etiology: Surgical removal or congenital absence.
Treatment: Special diet, nutritional supplements, sometimes IV nutrition.
Bacterial Overgrowth Syndrome
Definition: Excessive growth of bacteria in the intestine affects absorption.
Symptoms:
Abdominal discomfort
Diarrhea
Nutritional deficiencies.
Treatment: Address underlying issues and ensure proper absorption.
Whipple Disease
Definition: Rare bacterial infection interfering with digestion.
Etiology: Infection with Tropheryma whipplei.
Symptoms:
Diarrhea
Abdominal cramps and pain.
Treatment: Prolonged use of antibiotics.
Protein-Energy Malnutrition
Etiology: Leakage of protein-rich materials into the intestine.
Symptoms:
Diarrhea
Edema
Ascites
Malnutrition.
Treatment: Embolization if indicated.
Inflammatory Bowel Disease
Ulcerative Colitis
Definition: Chronic disease with inflammation and ulceration of the colon.
Etiology: Immune dysfunction, hereditary factors.
Signs and Symptoms:
Diarrhea with blood or pus
Abdominal pain
Weight loss.
Treatment:
5-ASA drugs, corticosteroids, immunomodulators, biologics.
Crohn’s Disease
Definition: Inflammation that can affect any part of the GI tract.
Etiology: Immune system and hereditary factors.
Signs and Symptoms:
Diarrhea
Abdominal pain
Blood in stool
Mouth sores.
Treatment: Anti-inflammatory drugs, immune suppressors, nutritional therapy, surgery.
Non-infectious Diseases
Diverticulitis
Etiology: Development of pouches in the colon under pressure.
Signs and Symptoms:
Abdominal pain
Nausea
Fever.
Treatment:
Antibiotics, liquid diet, surgery if needed.
Ischemic Colitis
Etiology: Buildup of deposits in vessels, low blood pressure, blood clots.
Signs and Symptoms:
Abdominal pain
Blood in stool.
Treatment:
Antibiotics and fluids, possible surgery.
Solitary Rectal Ulcer Syndrome
Etiology: Constipation, straining, rectal prolapse.
Signs and Symptoms:
Rectal bleeding
Pain in the pelvis.
Treatment: Dietary changes, behavior therapy, medications, sometimes surgery.
Diverticular Diseases and Common Anorectal Disorders
Umbrella term for diseases causing diverticula in the colon.
Common Anorectal Disorders:
Rectal prolapse
Fecal incontinence
Hemorrhoids
Anorectal abscess
Fistula in ano
Anal fissures.
Hemorrhoidal Disease
Etiology: Increased pressure in the rectum from straining or prolonged sitting.
Signs and Symptoms: Itching, pain, swelling, bleeding.
Treatment Options: Over-the-counter remedies, rubber band ligation, or surgical options.
Fistula In Ano
Definition: Abnormal connection between the anal canal and skin.
Etiology: Anal abscesses, Crohn’s disease.
Signs and Symptoms: Pain, irritation, smelly discharge.
Treatment Options: Fistulotomy and various surgical techniques.
Anal Fissure
Definition: Tear in the anal mucosa.
Etiology: Trauma from bowel movements.
Signs and Symptoms: Sharp pain and bleeding during bowel movements.
Treatment: Typically heals within weeks, pain management as needed.
Summary of Signs, Symptoms, and Treatments for Intestinal Issues
Mesenteric Vascular Insufficiency
Etiology: Decreased blood flow to intestines.
Symptoms: Abdominal cramps, pain, diarrhea.
Treatment: Surgery or antibiotic therapy.
Acute Intestinal Obstruction
Etiology: Adhesions, hernias, tumors.
Symptoms: Crampy abdominal pain, constipation, vomiting.
Treatment: IV fluids, possible surgery.
Appendicitis and Peritonitis
Appendicitis Etiology: Obstruction of appendiceal lumen.
Signs: Sudden lower right abdominal pain, nausea.
Treatment: Appendectomy.
Peritonitis Etiology: Infection or injury causing inflammation.
Signs: Abdominal pain, tenderness, fever.
Treatment: Antibiotics, addressing the cause.