Gastric Disease & microbiology Flashcards
3 types of gastric cancer
Adenocarcinoma (H. pylori)
Lymphoma
GISTs
Clinical presentation of gastric cancer
Dyspepsia Abdominal pain Vomiting Dysplasia Early satiety Weight loss Abdominal mass Jaundice Paraneoplastic syndromes
Physical examination findings of gastric cancer
Weight loss
Lymph nodes
Abdominal mass
Investigation for.suspected gastric cancer
Endoscopy & biopsy
Imagin studies for gastric cancer
Barium meal
CT scan
Alarm features for gastric/oesophageal cancer
> 55 years of age Dysphasia Evidence of GI blood loss Persistent vomiting Unexplained weight loss Upper abdominal mass Anaemia
First line treatment for gastric cancer
Surgery
Treatment of inoperable gastric cancer
Radiotherapy
Chemotherapy
Contraindications for surgery in gastric cancer patients
Widely metastatic disease
Malignant ascites
Brief life expectancy
5 year survival rate for gastric cancer
15%
What is dyspepsia?
Disordered digestion usually associate with pain or discomfort in the lower chest abdomen after eating
Causes of dyspepsia
Non-ulcer and dyspepsia Oesophagitis/GORD Duodenal/gastric ulcer Gastric malignancy Duodenitis Gastritis
Risk factors for gastric ulcers
Smoking Alcohol Age NSAIDs GORD Stress Delayed gastric emptying
Symptoms of gastric ulcers
Epigastric pain related to meals
Relieved by antacids
Weight loss
Investigation for peptic ulcer
Endoscopy & biopsy
How do you check healing of peptic ulcer?
Further endoscopy
How long after treating the cause of a peptic ulcer do you review the patient?
4 weeks
If after 4 weeks the peptic ulcer is still there what do you do next?
Test for H. pylori
What is the treatment to eradicate H. pylori?
PPI
Amoxicillin (metronidazole if allergic)
Clarythromycin
If a peptic ulcer shows no improvement but the H. pylori test is negative what is the next step of treatment?
PPIs (omeprazole) or H2 blockers (ranitidine) for 4 weeks
What is gastroparesis?
Delayed gastric emptying not caused by obstruction
Symptoms of gastroparesis
Bloating Feeling of fullness Vomiting Weight loss Abdominal pain
In surgery for gastric cancer when is a partial and total gastrectomy performed?
Total gastrectomy for proximal lesions
Partial gastrectomy for distal lesions
What are causes of acute gastritis?
Trauma
Chemicals
Burns
What are the 3 main causes of chronic gastritis?
Chemical
Bacterial
Autoimmune
What happens in autoimmune gastritis?
Antibodies attack parietal cells and intrinsic factor and can lead to pernicious anaemia
What is the most common bacteria that causes gastritis?
H. Pylori
Where does H. pylori like to reside?
Between the epithelial cell surface and mucosal barrier here it can cause inflammation
Which chemicals are the most common cause of chemical gastritis?
NSAIDs
Bile reflux
Alcohol
How does chemical insult affect the stomach?
Destroys the lipid bilayer causing inflammation, hyperplasia and ulcers
What is food poisoning?
Illness caused by eating food contaminated with micro-organisms, toxins, poisons etc
What are the important questions in the history when thinking of food poisoning?
Diarrhoea (blood? Colour? Quantity?) Travels? Suspect food? Anyone else I'll? Time from ingestion of suspect food? Age of patient? Underlying medical problems?