Crohns Flashcards

1
Q

more common in ___

A

males

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2
Q

where in the GI tract can crohns affect and where is it most common?

A

can affect any region of the GI tract from the mouth to the anus but most common in terminal ileum and colon

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3
Q

about 50% of people with crohns get _____ disease

A

perianal

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4
Q

what happens in perianal disease

A
  • get Recurrent abscess formation
  • Pain
  • Can lead to fistula with persistent leakage
  • Damaged sphincters
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5
Q

crohns symptoms are determined by the ___ of the disease

A

site

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6
Q

what are the sypmtoms of crohns in the small intestine?

A
  • Abdominal cramps (peri-umbilical)

- Diarrhoea, weight loss

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7
Q

what are the sypmtoms of crohns in the colon?

A
  • Abdominal cramps (lower abdomen)
  • Diarrhoea with blood
  • Weight loss
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8
Q

what are the sypmtoms of crohns in the mouth?

A
  • painful ulcers, swollen lips, angular chelitis
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9
Q

what are the sypmtoms of crohns in the anus?

A

perianal pain, abscess

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10
Q

what may be found on clinical examination

A
  • Evidence of weight loss
  • RIF mass
  • Perianal signs - inflammation at or near to the anus, including tags, fissures, fistulas , abscesses
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11
Q

what blood tests would you do?

A

FBC - may show anaemia, leukocytosis

CRP and ESR- high

platelets

iron studies - anaemia

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12
Q

what other tests would you do?

A

serum folate and B12 - may be low

stool testing

Metabolic panel

AXR

CT abdomen

MRI

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13
Q

what may be seen on AXR?

A

small bowel or colonic dilatation, calcification, sacroiliitis, intra abdominal abscess

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14
Q

what may be seen on CT

A

skip lesions, bowel wall thickening, surrounding inflammation, abscess, fistulae

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15
Q

get ____ ____ in 30-50% of people pathoogicaly

A

non-caseating granuloma

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16
Q

transmural or mural

A

transmural inflammtion

17
Q

pathology summary:

  • Ileal and/or colonic chronic active mucosal inflammation including - ____, ___ _____
  • _____ inflammation
  • Fissuring
  • -______ 50%
A

Ileal and/or colonic chronic active mucosal inflammation including - cryptitis, crypt abscesses
Transmural inflammation
Fissuring
Grnaulomas 50%

18
Q

what are the highly likely complications

A
  • small bowel obstruction - due to bowel wall thickening
  • anaemia
  • malabsorption
  • fistulas
  • short bowel syndrome
19
Q

what are the moderately likely complications

A
  • perforation
  • infective colitis as a result of immunosuppressive therapy
  • colorectal cancer
  • hepatotoxicity from - methotrxte drug
  • pulmonary fibrosis from methotrexate
20
Q

what are the other complications

A
  • toxic megacolon - rarer than in UC
  • Anal disease: sinuses, fissures, skin tags, abscesses, perineum falls apart
  • PSC - more in UC though
21
Q

what is on the differential diagnosis for crohn’s

A
  • Ulcerative colitis
  • Infectious colitis
  • Pseudomembranous colitis
  • Ischaemic colitis
  • Radiation colitis
  • Yersinia enterocolitica
  • Amoebiasis
  • Cytomegalovirus colitis
  • Colorectal cancer
  • Diverticular disease
  • Acute appendicitis
  • Ectopic pregnancy
22
Q

what would make you think infectious colitis instead of crohns?

A

Infectious colitis - history of sick contacts and travel to endemic areas

23
Q

what would make you think pseudomembranous colitis instead of crohns?

A

history of antibiotic use

24
Q

what would make you think CMV colitis instead of crohns?

A

if they are immunocompromised

25
Q

what would make you think colorectal cancer instead of crohns?

A

Colorectal cancer - increased risk with increasing age and positive FHx

26
Q

what would make you think diverticular disease instead of crohns?

A

Diverticular disease - left sided abdo pain commonly

27
Q

what would make you think appendicits instead of crohns?

A

younger patinets