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2. Please describe in detail the difference between Crohn's disease and Ulcerative Colitis.

2. Please describe in detail the difference between Crohn's disease and Ulcerative Colitis.

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Answer #1

Ulcerative colitis and crohn's disease both comes under a comman name inflammatory bowel.disease

Crohns disease : it is also known as regional enteritis

It is a idiopathic condition which is characterised by transmural , non casesting granulomatous inflammation .The most commonly affected area is segment of terminal ileumor colon

Ulcerative colitis : it is a idiopathic form of acute and chronic ulcero inflammatory colitis affecting mainly the mucosa and submucosa of the rectum and descending colon

Both disease comman in 2 and 3rd decade of life .

Crohns disease can be developed in any part of GIT from.mouth to anus but most commaly the affected area is 15 - 25 cm of terminal ileum which may extend to caecum and sometimes ascending colon

Grossly the crohns disease characteristic feature is multiple well demarcated segmental bowel involvement with intervening uninvolved skip areas .

The wall of the affected area is thick and hard so it is also called as hose pipe hardening

The mucosa aslo have serpiginous ulcers

Intervening surviving mucosa is swollen giving cobblestone appearance .

Ulcerative colitis

Classically ulcerative colitis begin in the rectum in countinous form and extend to sigmoid colon descending colon transverse colon. The colonic content may rarely backflow into the terminal ileum in continuity causing black wash ileitis in 10 percent patients

The characteristic feature if UC are

It is countinous involvement of the rectum and colon without any skip areas . There are only superficial ulcers present in the mucosa

The intervening intact mucosa may form inflammatory pseudopolyps

The muscle layer are usually thickened due to contraction due to which there is narrowing and shorting of the colon

There is loss of haustral folds which gives it garden hose appearance

The summarize the full difference between these two we should look into the following tabular form

Features crohns disease ulcerative colitis

A. MACROSCOPIC

1. Distribution segmental with skip areas continuous with out skip areas
2. Location

usually any part of GIT but commonly

Terminal ileum or ascending colon

Commonly rectum , sigmoid colon
3. Extent

usually involve entire thickness

of the affected area of the bowel wall

Usually superficial
4. Ulcers serpiginous ulcer develop into deep fissures superficial mucosal ulcers without fissures
5. Pseudopolyps rarely seen commanly found
6. Fibrosis comman rare
7. Shortening due to fibrosis due to contraction of muscles
B. MICROSCOPIC
Depth of information typically transmural it involve mucosa and sub mucosa
Type of inflammation non caseating granuloma crypt abscess are present
Mucosa patchy ulceration hemorrhagic mucosa with ulceration
Sub mucosa widened due to edema normal
Muscularis infiltrated with inflammatory cells usually spared
Fibrosis present absent
C. COMPLICATIONS
1. Fistula formation internal and external fistula rare
2. Malignant changes rare may occur
3. Type of malignancy lymphoma more than carcinoma carcinoma more than lymphoma
4. Fibrous strictures comman never

Hope you find this helpful thank you ☺️?

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