Small and Large bowel disorders Flashcards

1
Q

What are the 2 major IBDs

A

Crohns and Ulcerative Colitis

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2
Q

What gene is linked to the develpment of Crohn’s disease

A

CARD15/NOD2 gene on chromosome 16

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3
Q

Where is there the greatest prevalence of IBD

A

Developed countries where there is improved sanitation

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4
Q

Smoking is protective in Ulcerative Colitits. True or False

A

True

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5
Q

Smoking is protective in Crohn’s disease. True or False

A

False

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6
Q

What is the incidence of Crohns in the developed world

A

7 in 100,000

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7
Q

What is the incidence of Ulcerative colitis in the developed world

A

12 in 100,000

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8
Q

What disease is increasing in prevalence

A

Crohn’s disease

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9
Q

What is the immune response in Crohn’s disease

A

Th1 driven

release of TNF alpha and interferon gamma

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10
Q

What is the immune response in Ulcerative colitis

A

Th2 driven

increased release of proinflammatroy cytokines including IL-5

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11
Q

Give characteristic features of Crohns which are absent in Ulcerative Colitis

A
Skip lesions (non-continuous fashion) 
Ileocaecal is the most common area to be affected 
Full thickness inflammation
deep ulcers 
cobblestone appearance 
may cause fistula and abscess
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12
Q

Give characteristic features of UC which are absent in Crohn’s

A

Involves the rectum and extends in a confluent manner to involve the sigmoid colon and rectum
Only colonic mucosa is involved
Inflammation is confined to the mucosa
higher incidence of colorectal carcinoma

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13
Q

What is the histological hallmark of Crohn’s disease

A

Giant cell granuloma

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14
Q

What is the histological hallmark of UC

A

Acute and chronic inflammatory cells and abscesses

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15
Q

What are the common presentations of Crohn’s disease

A
Abdominal pain  
diarrhoea 
Weight loss 
malabsorption
anorexia 
malaise
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16
Q

What is the common presentations of UC

A

Bloody diarrhoea
tenesmus
abdominal pain

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17
Q

How is the severity of UC determined

A

By the frequency, degree of blood loss in stools, pule and temperature

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18
Q

What are some complications of IBD

A

Toxic megacolon
Perforation
Cancer

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19
Q

What could be used to investigate a patient who is too unwell to undergo endoscopy or abdominal CT

A

Radiolabelled white cells scan

20
Q

What is the first line treatment of Crohn’s disease

A

Oral prednisolone for 4-6 weeks

21
Q

What is the main drug used to treat Ulcerative Colitis

A

5ASA

22
Q

What is the main drug used to treat Ulcerative Colitis

A

5ASA

23
Q

Why are patients with IBD predisoposed to metabolic bone disease

A

The use of steroids

24
Q

What can steroids cause in children

A

Growth retardation

25
Q

What percentage of ileal crohn’s patients will have at least one operation

A

90%

26
Q

When is surgery for UC most common

A

In the first 5 years after diagnosis

27
Q

What is microscopic colitis

A

Collagenous colitis and lymphocytic colitis

28
Q

Who is most likely to get microscopic colitis

A

Patients with coeliac disease, autoimmune disorders and those taking PPIs and NSAIDs

29
Q

On what side of the colon are changes most commonly seen in microscopic colitis

A

right

30
Q

What age do patients present with IBS

A

Any age

31
Q

How is the diagnosis of IBS made

A

Having excluded organic diseases with the same symptoms

32
Q

What are the 3 categories for IBS

A

c-IBS - constipation
d-IBS - diarrhoea
m- IBS - mixed

33
Q

What are the main symptoms of IBS

A

Cramping abdominal pain
Rectal mucus loss
Incomplete evacuation

34
Q

What can be used to treat patients with IBS

A

Antispasmodics
Tricyclic antidepressants in low dose
Occasional patients need hypnotherapy or CBT

35
Q

What can be used to treat patients with IBS

A

Antispasmodics
Tricyclic antidepressants in low dose
Occasional patients need hypnotherapy or CBT

36
Q

What is the least vulnerable vessel to ischaemia

A

Coeliac vessel

37
Q

What are 4 causes of gut ischaemia

A

Arterial thromboembolism
Venous insufficiency
Profound hypotension
Vasculitis

38
Q

What is acute small bowel ischamia

A

A rare medical emergency characterised by severe abdominal pain with minimal physical signs

39
Q

In terms of ABGs, what is common in acute small bowel ischaemia

A

Metabolic acidosis

40
Q

What is the management for acute small bowel ischaemia

A

Aggressive resuscitation
analgesia
correction of acidosis

41
Q

When does the pain typically start in chronic intestinal ischaemia

A

30 mins after eating and can last 4 hours

42
Q

What is the gold standard test for chronic intestinal ischaemia

A

Angiography

43
Q

What might be seen on an Abdo X ray in Ischaemic colitis

A

Thumb printing at the splenic flexure (mucosal oedema)

44
Q

When does acute radiation enteritis occur

A

Early weeks after first radiotherapy

45
Q

What are the symptoms of acute radiation enteritis

A

Vomiting
Pain
diarrhoea