GI Core Conditions Flashcards
How many people experience GORD:
Daily?
Weekly?
1 in 10
1 in 5
Who gets GORD?
M>F, > 40, anyone
Causes of GORD?
Reflux of acid above the lower oeso sphincter due to: Hiatus Hernia Sphincter dysfunction Acid hypersecretion Stress Peptic ulcers NSAIDs SSRIs
GORD risk factors?
High fat diet Spicy/acidic food Lying down after eating Pregnancy Alcohol Smoking Respiratory conditions Previous GORD surgery
Symptoms of GORD?
Heartburn Reflux Acid/bile regurg Chest pain worsened by bending down Excessive salivation Dysphagia/odynophagia Nausea Persistent cough Laryngitis
Differential diagnoses for GORD?
Oesophagitis
Gastric ulcers
Infections
Barrett’s oesophagus
Investigations for GORD?
Endoscopy
Barium swallow
24 hour intraluminal pH monitoring
Treatment for GORD?
Alginate and antacids Metoclopramide H2 receptor antagonists (cimetidine) PPIs (omeprazole) Surgery for strictures/erosive oesophagitis Lifestyle changes
Which are more common, duodenal or gastric ulcers?
Duodenal (2-3x more likely)
Who gets peptic ulcers?
Older women, becoming more prevalent in developed countries due to H pylori
Causes of peptic ulcers?
H pylori
Drugs (NSAIDs, steroids, aspirin)
Malignancy
Risk factors for gastric ulcers? (5)
Smoking Duodenal reflux Delayed gastric emptying Stress Zollinger-Ellison syndrome
Risk factors for duodenal ulcers?
Smoking
Zollinger-Ellison syndrome
Blood group O
Symptoms of peptic ulcer disease?
Burning epigastric pain Comes on at night Worse when hungry DU alleviated by food/milk GU causes N+V, anorexia, weight loss
Differential diagnoses for peptic ulcers?
Gastritis Malignancy GORD Pancreatitis Cholecystitis Biliary colic Inferior MI Superior mesenteric ischaemia Referred pain (pleurisy, pericarditis)
Investigations for peptic ulcers?
IgG serology C-urea breath test Stool antigen test (H pylori) Endoscopy Biopsy
Treatment for peptic ulcers?
Eradication therapy (omeprazole, clarithromycin _ amxocillin/metronidazole)
Lifestyle changes
PPIs or H2 receptor antagonists
Surgery to remove the ulcer
Which are more common: upper or lower GI bleeds?
Upper GI bleeds
Who has upper GI bleeds?
Anyone, more common as you get older
Causes of upper GI bleeds?
NSAIDs Peptic ulcers Mallory-Weiss tears Gastroduodenal erosions Oesopahgitis Oesophageal varices Malignancy
Risk factors for upper GI bleeds?
Alcohol abuse
Chronic renal failure
Increasing age
Low SEC
Symptoms of upper GI bleeds?
Haematemesis Dizziness Abdo pain Postural hypotension Cool extremities Chest pain Confusion/delirium Dehydration Oliguria Stigmata of liver disease
Risk assessment for upper GI bleeds?
Rockall score (0-3) considers age, circulation (pulse +BP), comorbidity, endoscopic diagnosis, major SRH)
What signs indicate Boerhaave’s syndrome?
Subcut emphysema
Vomiting
Differentials for upper GI bleeds?
Gastric varices Mallory-Weiss tears Neoplasm Benign tumour Cirrhosis
Investigations for upper GI bleed?
Endoscopy
LFTs, FBC, coag, cross match, Ca and Gastrin levels
Treatment for upper GI bleeds?
Stop NSAIDs, warfarin, aspirin Give O2 Saline if not shocked, blood if shocked Omeprazole for ulcer patients Monitor for signs of rebleed
How many cases of GI bleeds are lower GI?
1 in 3
Who has lower GI bleeds?
Elderly
Risk factors for lower GI bleeds?
Elderly Coagulopathy Anticoagulated Liver disease NSAIDs GORD Gastritis Colorectal cancer
Symptoms of lower GI bleeds?
Blood in stool (maroon –> bright red)
Abdo/rectal pain
Diarrhoea
Mucous (IBD in the young, ischaemic colitis in the old)
Blood drops in toilet (fissures/haemorrhoids)
Massive haemorrhage presents with systolic <90mmHg and Hb<6g/dL
Causes of lower GI bleeds?
Colorectal cancer Diverticulosis Angiodysplasia Proctitis Infective/ischaemic colitis
Investigations for lower GI bleeds?
Colonoscopy
Faecal occult blood test
Angiography (for angiodysplasia)
Treatment for lower GI bleeds?
O2, vital signs monitor, IV fluids, surgery or endoscopic haemostasis
Who gets Crohn’s disease?
Younger people
Women>Men
People of Jewish heritage
Causes of Crohn’s?
Genetics
Immune system disruption
Environmental (disease f the west)
Mycobacterium avium paratuberculosis
Risk factors for Crohn’s?
Western diet Younger age (more aggressive disease) Smoking FHx Intestinal parasite exposure Long term use of OCP Caucasian/Jewish
Symptoms of Crohn’s?
Diarrhoea Abdo pain Weight loss Malaise Lethargy Nausea/vomiting Fever RIF pain Aphthous ulcers Skip lesions
Differentials for Crohn’s?
Coeliac disease Lactose intolerance UC Functional diarrhoea GI infection (TB) Colorectal malignancy Anorexia nervosa Appendicitis Diverticulosis Gastroenteritis
Investigations for Crohn’s?
Serum B12 FBC, inflammatory markers, LFTs, blood cultures pANCA -ve Saccaromyces cerevisiae Ab PRESENT Stool cultures Radiology
Treatment for Crohn’s?
Control diarrhoea (loperamide or codeine phosphate)
Glucocorticosteroids (budenoside)
Enteral nutrition
Aminosalicylates (azathioprine)
Immunosuppression with monoclonalAbs (infliximab)
Surgical resection
Who gets UC?
People of Jewish heritage
Causes of UC?
Genetics
Immune system
Environmental
Risk factors for UC?
Western diet Younger age (more aggressive) FHx NSAIDs Intestinal parasite exposure
Symptoms of UC?
Diarrhoea with blood/mucous Malaise Lethargy Anorexia + weight loss Proctitis + blood in stool Urgency and tenesmus Distended abdomen PR may show blood
Differentials for UC?
Crohn's Functional diarrhoea GI infections Malignancy Diverticulitis Polyps IBS
Investigations for UC?
FBC, LFTs, U+Es, CRP
Faecal calprotectin
pANCA +ve
Saccharomyces cerevisiae Ab possible
Stool cultures
Sigmoidoscopy (rigid) shows inflamed, bleeding, fraible mucosa
AXR - lead piping (chronic) and thumbprinting (exacerbation)
Treatment for UC?
Oral aminosalicylate (azathioprine) and steroids,
Ciclosporin (cannot be used long term)
Infliximab
Surgery
When do patients typically present with IBS?
30s-40s
What typically precipitates IBS?
A bout of gastroenteritis
Causes of IBS?
Unknown
Changes in gut bacteria/digestive ability
More sensitive to gut pain
Psychological factors
Post food poisoning
Certain foods (caffeine, fatty foods etc)
Risk factors of IBS?
Acute GI infection/inflammation
Young
Female
FHx
Symptoms of IBS?
Diarrhoea Constipation Abdo pain Bloating Worse on eating Relieved on defaecation Lethargy Nausea Backache Bladder symptoms
Differentials for IBS?
IBD Colonic cancer Coeliac disease Gastroenteritis Diverticular disease Endometriosis Ovarian tumours Anxiety/depression Somatisation
Investigations for IBS?
FBC, inflammatory markers Coeliac serology Lactose intolerance testing Stool culture Colonoscopy (malignancy suspected) Faecal calprotectin CA125 (if concerned about ovarian cancer)
Treatment for IBS?
Diet change Exercise Laxatives Antidepressants Hypnotherapy Probiotics Smooth muscle relaxants (alverine)
How many people are affected by gastroenteritis every year?
1 in 5
What is the most common cause of gastroenteritis in adults?
Norovirus
Most common cause of gastroenteritis in children?
Adenovirus/rotavirus
Who gets gastroenteritis?
Anyone (mainly children)
Travel to foreign countries
Infants in day care
Elderly
Viral causes of gastroenteritis?
Norovirus
Rotavirus
Adenovirus
Bacterial cause of gastroenteritis?
Campylobacter E coli (esp O157) Salmonella Shigella Staph aureus toxins Bacillus cereus C perfringens
Parasitic causes of gastroenteritis?
Cryptosporidium spp
Entamoeba histolytica (amoebiasis)
Giardia lamblia
Risk factors for gastroenteritis?
Poor hygeine/sanitation
Compromised immune system (HIV/AIDs)
Achlorydia (esp for salmonella and campylobacter )
Food poisoning
Symptoms of gastroenteritis?
V+D, abdo pain
Blood suggests E coli, E. histolytica or if from exotic location - salmonella
Pyrexia and fatigue in adults suggests invasive organism
Differentials for gastroenteritis?
Travellers diarrhoea Volvulus UTI Constipation with overflow gastritis NSAID or alcohol abuse IBD Addison's (Pre) eclampsia
Investigations for gastroenteritis?
Stool microscopy, culture and sensitivity (if blood/mucous in immunocomp pts)
Bloods in patient is unwell
Bowel distention = imaging
Treatment for gastroenteritis?
ORS for the frail/elderly
Small light meals
Prevent infection spread (avoid work until 48 hours post diarrhoea)
Loperamide for adults with normal diarrhoea (no blood, mucous, pyrexia)
Abx for bacterial/protozoal infections (metronidazole or oral vancomycin)
Why are the rates of acute pancreatitis on the rise?
Alcohol abuse
At what age do you see:
a) alcohol related pancreatitis?
b) gallstone related pancreatitis?
a) 38
b) 69
Causes of acute pancreatitis?
Gallstones Alcohol Infections (mumps, coxsackie B) Pancreatic tumours Drugs (valproate, corticosteroids) Ischaemia Trauma
Risk factors for acute pancreatitis?
Anatomical or functional disorders (sphincter of Oddi dysfunction) SLE Alcohol abuse Hypercalcaemia Hyperparathyroidism Vasculitis Hyperlipidaemia
Symptoms of acute pancreatitis?
Epigastric pain
N+V
Radiates to back
Tenderness and guarding
Reduces/absent bowel sounds in late stages
Severe necrotising pancreatitis leads to Cullen’s (periumbilical) and grey Turner’s (right flank)
Jaundice/cholangitis if gallstones
Differentials for acute pancreatitis?
Acute mesenteric ischaemia Cholangitis Cholecystitis Ectopic pregnancy Diabetic ketoacidosis Perforated duodenal ulcer Atypical MI
Investigations for acute pancreatitis?
Serum amylase (3x normal levels = diangosis) Serum lipase FBC, LFTs, U+Es, inflammatory markers CXR Abdo US CT/MRI
Treatment for mild acute pancreatitis?
Normal ward Pain relief IV fluids NBM Abx if specific infection No imaging
Treatment for severe acute pancreatitis?
STEP UP TO HDU Necrosis = IV Abx Enteral nutrition Surgery if necrosis Percutaneous catheter to drain Hyperbaric O2 therapy
Who gets chronic pancreatitis?
M>F, >40 years old
Causes of chronic pancreatitis?
Reduced bicarb excretion –> activation of pancreatic enzymes
Genetic
Autoimmune (PBC and sjorgens have assocaiteions)
Abnormal pancreas
Biliary tract disease
Risk factors for chronic pancreatitis?
Alcohol Smoking Anatomical or function disorders SLE Hypercalcaemia Hyperparathyroidism Vasculitis
Symptoms of chronic pancreatitis?
Epigastric pain Radiates to back N+V Anorexia Severe weight loss Exocrine ad endocrine insufficiency Cholangitis and jaundice
Differentials for chronic pancreatitis?
Cholangitis Cholecystitis Crohn's Gastritis Mesenteric artery ischaemia Peptic ulcers Pneumonia MI AAA Acute hepatitis
Investigations for chronic pancreatitis?
Serum amylase. serum lipase, LFTs, FBC, inflammatory markers, BM, creatinine CXR Abdo US CT/MRI Faecal elastase levels PABA test Secretin stimulation test Diagnostic ERCP
Treatment for chronic pancreatitis?
Stop drinking alcohol Stop smoking Analgesia - amitriptylline Enzyme replacements if malabsorption occurs Restrict fat in diet if steatorrhoea is present Insulin if diabetes develops Vitamin supplements may be needed Surgery
What types of gallstones are there?
Cholesterol (80% in the Western world)
Pigment
Mixed
Who gets gallstones?
Fat Female Fertile Forty Fair
What causes gallstone precipitation?
Lack of melatonin
Melatonin inhibits cholesterol secretion and enhances its conversion to bile
Risk factors for gallstones?
Increasing age Female FHx Multiparity Obesity Rapid weight loss High fat, low fibre diet OCP DM Cirrhosis
Symptoms of gallstones?
Asymptomatic Biliary colic Crescendoing abdo pain Worse on eating fatty foods Epigastric pain --> shoulder tip N+V Cholecystitis = +ve Murphy's sign
Differentials for gallstones?
Reflux IBS Pancreatitis Right colon cancer Atypical peptic ulcers Renal colic
Investigations for gallstones?
LFTs, FBC ECG CXR Abdo US Biliary scintigraphy using technetium derivatives of iminodiacetate (outlines the biliary tree apart from in acute cholecystitis)
Treatment for gallstones?
Cholecystectomy
Stone dissolution
Stone wave lithiotripsy
When is hepatitis A mainly seen?
Autumn
What is the most common cause of acute hepatitis?
Hepatitis A
How is Hep A spread?
Faecal-oral
Incubation of Hep A?
2-6 weeks, most infectious 2-3 weeks post infection
Risk factors for Hep A?
Poor sanitation Men who have sex with men Sexual practices with oro-anal contact Sweage/lab workers HIV Travel to high risk areas Receiving factor VIII and IX Not vaccinated
Symptoms of Hep A?
Flu-like prodrome (precedes icterus phase)
Poor appetite
Pressure/pain from enlarged liver
Skin rash
More developed stages: jaundice, dark urine, pale stools, abdo pain, pruritus
Differentials for Hep A?
Drug induced liver injury Ischaemic hepatitis HIV CMV Other forms of viral hepatitis
Investigations for Hep A?
IgM Ab for HAV appears with symptoms and persists for 3-6 months
IgG appears soon after IgM and persists for years (indicates previous infection or immunisation)
LFTs, PTT
US if concern about cause
Treatment for HAV?
Immune system can deal with it
Analgesia
Fluids
Admit if vomiting/systemically unwell
Where is HBV more prominent?
Africa
Middle East
Far East
How is HBV spread?
Parenterally
Vertical transmission is common
Hep B E Ag +ve is associated with?
High replication rates
More infectious disease
Incubation of HBV?
2-3 months
Risk factors for HBV?
Alcohol use Poor sanitation Needle sharing MWHSWM HIV +ve Sexual contact Liver disease O-A contact Lab/sewage workers
Symptoms of HBV?
Anorexia/nausea RUQ ache Insidious onset Malaise, fatigue Slight fever Aching joints/muscles Headache More advance = jaundice
Differentials for HBV?
Drug induced Ischaemic Wilson's Acute fatty liver of pregnancy Other forms of hepatitis
Investigations for HBV?
HBsAg HBeAg Anti-HBe Anti-HBs Anti-HB core Quantitative Hep B viral DNA HBV genotype HDV serology LFTs, FBC Autoantibody screen Check for HCV
Treatment for HBV?
Stop alcohol
Stop unnecessary drugs
Pts with E Ag HBV or decompensated liver disease get 48 weeks of peginterferon alpha-2a
What percentage of IVDUs have hep C?
50-60%
How is HCV spread?
Parenteral transmission
Who gets HCV?
IVDU Male >40 (worse prognosis) Drink alcohol Co-infection with HIV, HBV Immunosuppressed Obese DM
HCV incubation?
6-9 weeks
How many genotypes of HCV are there? Which requires the most treatment?
3
Genotype 1 requires most treatment
Can be cross infected
Risk factors for HCV?
IVDU Blood transfusions Pregnancy/BF Sexual intercourse (rare) Needlestick Non-sterile piercings/tattoos/medical equipment
Symptoms of HCV?
Often asymp
Chronic infections –> malaise, lethargy, weakness, anorexia
Acute: jaundice and deranged LFTs
75% –> chronic (cirrhosis + HCC)
Differentials for HCV?
Drug induced Ischaemic Wilson's Acute fatty liver of pregnancy Other hepatitis types
Investigations for HCV?
Anti-HCV serology (+ve 3 months post exposure) HCV RNA (shows ongoing activity) Anti HCV Abs (remain for life) Baseline US Biopsy LFTs
Treatment for Hep C?
Uncomplicated + acute = supportive
Early interferon may prevent complications (unlicensed)
Peginterferon alpha 2-a (SC, weekly)
Daily (oral) ribavirin
Genotype 1 requires bocepavir and telaprevir
Who gets HDV?
5% of HBV carriers
IVDUs
How is it transmitted?
Parenterally
What is HDV?
A defective single strand RNA that requires the presence of HBsAg to replicate
Difference between co-infection and superinfection?
Co-infection = acquired at the same time Superinfection = HBV acquired first then subsequent HDV infection
Risk factors for HDV?
Sharing neeldes
MWHSWM
HIV
Blood transfusions
Symptoms of HDV?
Anorexia Nausea RUQ ache Insidious onset Malaise, lethargy Fever Aching muscles/joints Headaches Skin rash Later = jaundice
Investigations for HDV?
Anti-HDV Ab
LFTs
Hep B investigations
Treatment for HDV?
Interferon a and lamivudine
Transplantation
In what cases of HEV are mortality rates high?
Pregnancy and intrauterine infections
How is HEV spread?
Faecal-oral route
Incubation of HEV?
2-9 weeks
Risk factors for HEV?
Alcohol Poor sanitation Needle sharing MWHSWM HIV Oral-anal contact Lab/sewage workers Liver disease
Symptoms of HEV?
General malaise Slight fever Nausea Anorexia Taste changes RUQ ache Aching joints/muscles Headache Skin rash More developed = jaundice
Differentials for HEV?
Drug induced Wilson's Ischaemic hep Acute fatty liver of pregnancy Other hep causes
Investigations for HEV?
IgM anti-HEV Ab
HEV RNA can be detected in serum or stools
Treatment for HEV?
Supportive
No documented cases of chronic infection
What is the most common surgical emergency?
Appendicitis
Who gets appendicitis?
Mainly teenagers and young adults
More common in the West
M>F (slightly)
Causes of appendicitis?
Faecal matter trapped in appendix causing blockage and allowing bacteria to multiply
IBD
Risk factors for appendicitis?
Age (11-20) Male Low fibre, high refined carbs FHx GI infections (amoebiasis) Bacterial gastroenteritis Mumps Adenovirus
Symptoms of appendicitis?
Abdo pain that begins paraumbilical and then localises to the RIF (McBurneys point)
N+V
Anorexia
Rebound tenderness due to localised peritonitis
Fever + tachycardia suggest peritonitis
Differentials for appendicitis?
Bowel obstruction Strangulated hernia Perforated ulcer Acute terminal ileus due to Crohn's Pancreatitis Diverticulitis Ruptured ectopic Ovarian torsion Ovarian cyst rupture Testibular torsion Renal calculi UTI
Investigations for appendicitis?
Abdo exam US and CT Urinalysis FBC, inflammatory markers Cross match and coag screen
Treatment for appendicitis?
Open/laproscopic appendectomy
Abx to prevent infection
Whats percentage of obstructions are small bowel?
80%
Who gets small bowel obstructions?
Often seen in those with dementia, MS, Parkinson’s, quadreplegia
Causes of small bowel obstruction?
Adhesions Hernias Crohn's Intussusception (children) Malignancy
Risk factors for small bowel obstruction?
Paralytic ileus Intestinal pseudo-obstruction (Ogilive's syndrome) Post-operative ileus/strictures Congenital GI malformations Meconium ileus in CF Hirschsprung's Malignancy (rare - would be in caecum)
Symptoms of small bowel obstructions?
Abdo colic Abundant vomiting Late = absolute constipation Quickly progressing Severe pain + tenderness suggests perforation Distention Visible peristalsis
Differentials for small bowel obstruction?
Gastroenteritis Ischaemia of the gut Pancreatitis Perforation Peptic ulcers LBO Consider MI
Investigations for SBO?
Abdo exam Check for femoral hernias AXR FBC, U+E, creatinine, cross match CT + US
Treatment for SBO?
IV fluids
Decompression
Laparotomy with removal of obstruction if gangrenous tissue is present
What condition commonly presents with LBO?
Colorectal cancers
Who gets LBO?
> 70 years old
Causes of LBO?
Carcinoma
Sigmoid volvulus
Diverticular disease
Risk factors for LBO?
Colorectal cancers Paralytic ileus Intestinal pseudo-obstruction Post-operative ileus Congen GI malformations Meconium ileus in CF Hirschsprung's
Symptoms for LBO?
Pain Tenderness Tinkling bowel sounds Absolute constipation Distention Severe pain + tenderness suggest perforation
Differentials for LBO?
Gastroenteritis D+V tinkling Ischaemia of the gut Perforation Pancreatitis Peptic ulcers Consider ovarian carcinoma
Investigations for LBO?
Abdo exam AXR US + CT FBC, U+E cross match, creatinine Enema if suspicious of low level obstruction Water soluble enema for adhesions
Treatment for LBO?
IV fluids Decompression Colorectal stents Defunctioning colostomy Sigmoid volvulus may be managed with a flexible sigmoidoscope or rectal tube Persistent volvulus = RESECTION
What % of groin herniae are femoral?
5%
Who gets femoral hernias?
Parous women, middle aged/elderly
Causes of femoral hernias?
Chronic constipation Chronic cough Heavy lifting Obesity Straining to urinate (enlarged prostate)
Risk factors for femoral herniae?
Obesity
Smoking
Symptoms of femoral herniae?
Lump in groin, lateral and inferior to the pubic tubercle (large may bulge over the inguinal ligament)
Cough impulse
Reduces when relaxed/supine
Can be reducible/non-reducible/strangulated/obstructed
Differentials for femoral hernias?
Inguinal hernia Lymph node in groin Ectopic testes Psoas abscess Psoas bursa Li[oma Hydrocele Varicocele
Investigations for femoral hernia?
Mainly clinical exam
Exploration at surgery
Herniography may be performed for groin pain
Treatment for femoral hernia?
Surgery (low, transinguinal or high approach) that involves dissecting the sac and reducing its contents, ligating the sac and closing the inguinal and pectineal ligaments
LA or GA
Laproscopic studies seem promising
What is the most common type of hernia?
Inguinal
Who gets inguinal hernias?
Older men
Causes of inguinal hernias?
Chronic constipation Chronic cough Heavy lifting Obesity Straining to urinate
Risk factors for inguinal hernias?
Infants (male, premature) Male Obese Constipation Chronic cough Heavy lifting
Symptoms of an inguinal hernia?
Swelling in groin
Severely painful
Cough impulse
May be reducible
Enlarges with time due to fibrous adhesions (may stop being reducible)
Examine standing and supine, ask to cough
Can become strangulated
Congenital inguinal hernias need urgent surgical repair
Differentials for inguinal hernias?
Femoral hernia Hydrocele Varicocele Spermatic cord hydrocele Lymph node Abscess Bleeding Undescended testes
Investigations for inguinal hernias?
US
Herniography with XR contrast in peritoneum
Treatment for inguinal hernias?
Small = none
More complicated = reduction/excision of sac and closure of defect
Lapro if bilateral/recurrences
Surgery can be day case
Avoid driving/lifting for 7 days post-repair
In children herniotomy (ligation and excision of patent processus vaginalis) is performed