Inflammatory Bowel Disease — MCQs
What is the differentiating feature between irritable bowel syndrome and inflammatory bowel disease?
Which histological feature is more characteristic of ulcerative colitis than Crohn's disease?
All of the following are pathological features associated with Crohn's disease except which of the following?
True about Crohn's disease except
Emergency management of Ulcerative colitis is by:
Which of the following drugs is least effective or not typically used in the treatment of ulcerative colitis?
A 25-year-old woman presents with bloody diarrhea and is diagnosed with ulcerative colitis. Which of the following conditions is least likely to be associated with it?
The differentiating feature between IBS and organic GI disease is:
Which extra-intestinal symptom of inflammatory bowel disease worsens with exacerbation of disease activity?
Which X-ray finding is more suggestive of ulcerative colitis than Crohn's disease?
Inflammatory Bowel Disease Indian Medical PG Practice Questions and MCQs
Question 1: What is the differentiating feature between irritable bowel syndrome and inflammatory bowel disease?
- A. Stool calprotectin (Correct Answer)
- B. pain in abdomen
- C. Diarrhoea
- D. Mucus in stools
Explanation: ***Stool calprotectin*** - **Stool calprotectin** is a reliable biomarker used to differentiate between **Inflammatory Bowel Disease (IBD)** and **Irritable Bowel Syndrome (IBS)**. It's a protein released by neutrophils during intestinal inflammation. - Elevated levels of **calprotectin** strongly suggest **mucosal inflammation** characteristic of IBD (Crohn's disease or ulcerative colitis), while normal levels are typical in IBS, which lacks inflammation [1]. *pain in abdomen* - **Abdominal pain** is a common symptom in both IBS and IBD. In IBS, it's often linked to altered bowel habits and is a key diagnostic criterion [1]. - In IBD, abdominal pain is typically due to inflammation, strictures, or abscesses, but its presence alone does not differentiate the conditions . *Diarrhoea* - **Diarrhea** is a prominent symptom in both IBS and IBD. In IBS, it can be a predominant feature (IBS-D), often associated with urgency [1]. - In IBD, diarrhea is usually due to inflammation disrupting normal absorption and secretion, and it may contain blood or mucus . *Mucus in stools* - The presence of **mucus in stools** can occur in both IBS and IBD. In IBS, it's often present without blood and is generally considered part of altered bowel function [1]. - In IBD, mucus in stools, particularly when accompanied by blood, strongly suggests active intestinal inflammation and mucosal damage .
Question 2: Which histological feature is more characteristic of ulcerative colitis than Crohn's disease?
- A. Crypt abscess (Correct Answer)
- B. Mucosal edema
- C. Diffuse distribution of pseudopolyps
- D. Lymphoid aggregates in the mucosa
Explanation: ***Crypt abscess*** - **Crypt abscesses** are formed by neutrophils infiltrating and accumulating within glandular crypts, a hallmark of acute mucosal inflammation [1]. - While crypt abscesses **can occur in both ulcerative colitis and Crohn's disease**, they are **far more characteristic and frequent in ulcerative colitis** due to the diffuse, continuous mucosal involvement [1]. - In UC, crypt abscesses are seen in the acute phase and reflect the superficial mucosal inflammation pattern. - **Note:** The true distinguishing features of Crohn's disease include **transmural inflammation** [2], **non-caseating granulomas** (50% of cases) [3], and **skip lesions** [4], none of which are present in UC [5]. *Mucosal edema* - **Mucosal edema** is a non-specific inflammatory change present in both ulcerative colitis and Crohn's disease. - It occurs in many inflammatory bowel conditions and does not help differentiate between UC and CD. *Diffuse distribution of pseudopolyps* - **Pseudopolyps** (inflammatory polyps) result from repeated cycles of mucosal ulceration and regeneration. - While more common in **chronic ulcerative colitis**, they can also occur in Crohn's disease. - This is primarily a **macroscopic/endoscopic feature** rather than a microscopic histological finding [1]. *Lymphoid aggregates in the mucosa* - **Lymphoid aggregates** represent chronic immune activation and are found in **both UC and CD** [2]. - They reflect the underlying chronic inflammatory process but are not specific to either disease. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, p. 809. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 366-367. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 806-807. [4] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 365-366. [5] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 367-368.
Question 3: All of the following are pathological features associated with Crohn's disease except which of the following?
- A. Toxic megacolon (Correct Answer)
- B. Skip lesions
- C. Non-caseating granulomas
- D. Cobblestone appearance
Explanation: ***Toxic megacolon*** - Toxic megacolon is primarily associated with **ulcerative colitis**, not Crohn's disease, making it the exception among the listed features. - Crohn's disease typically does not lead to the **massive colonic dilation** seen in toxic megacolon. *Non caseating granulomas* - Found in Crohn's disease, these **granulomas** help in supporting the diagnosis and are characteristic features [1][2]. - They are also observed in other conditions like **sarcoidosis**, but are a definitive feature of Crohn's [1]. *Cobblestone appearance* - This refers to the **mucosal pattern** seen in Crohn's disease due to **transmural inflammation** and ulceration [2]. - It is a classic pathological finding and helps differentiate Crohn's from other gastrointestinal diseases [2]. *Skip lesions* - Skip lesions are segments of normal bowel found between inflamed areas in Crohn's disease, illustrating its **patchy distribution** [2]. - This feature is instrumental in diagnosing and understanding the nature of Crohn's disease. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 806-807. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 365-367.
Question 4: True about Crohn's disease except
- A. Transmural
- B. Recurrence is more common
- C. Rectum is involved (Correct Answer)
- D. Fissures are formed
Explanation: ***Rectum is involved*** - While Crohn's disease can affect any part of the gastrointestinal tract from mouth to anus, **rectal involvement is much less common** and often spares the rectum in typical cases, especially when compared to ulcerative colitis. [1] - The disease typically exhibits **skip lesions**, meaning there are healthy segments of the bowel between affected areas, and the rectum is frequently one of these spared regions. [1] *Transmural* - Crohn's disease is characterized by **transmural inflammation**, meaning the inflammation extends through all layers of the bowel wall, from the mucosa to the serosa. [1] - This transmural involvement can lead to complications such as **fistulas, strictures, and abscesses**. *Recurrence is more common* - **Recurrence after surgery is very common** in Crohn's disease, with many patients experiencing disease relapse within a few years post-operation. - This high recurrence rate often necessitates ongoing medical management and sometimes further surgical interventions. *Fissures are formed* - Due to the **transmural inflammation** and chronic nature of Crohn's disease, patients often develop **fissures**, which are deep cracks or excoriations, particularly in the perianal area. - These fissures can be quite painful and complicated by **fistula formation** or abscesses.
Question 5: Emergency management of Ulcerative colitis is by:
- A. Subtotal colectomy with end ileostomy (Correct Answer)
- B. Right hemicolectomy
- C. Total proctocolectomy with end ileostomy
- D. Left hemicolectomy
Explanation: ***Subtotal colectomy with end ileostomy*** - This is the **standard emergency procedure** for fulminant ulcerative colitis, toxic megacolon, perforation, or massive hemorrhage - Involves removal of the **entire colon** (from ileocecal junction to upper rectum) while **preserving the rectal stump** as a Hartmann's pouch - Creates an **end ileostomy** for fecal diversion - **Proctectomy is avoided** in the emergency setting due to higher morbidity, risk of pelvic sepsis, and technical difficulty in acutely ill patients - The rectal stump can be removed later (2nd stage) with consideration for **ileal pouch-anal anastomosis (IPAA)** after patient stabilization - This staged approach allows for optimization of the patient's condition and future reconstructive options *Total proctocolectomy with end ileostomy* - This involves removal of both the **colon and rectum** with permanent ileostomy - **NOT recommended in emergency settings** as proctectomy adds significant morbidity in critically ill patients - Requires pelvic dissection in inflamed tissues, increasing risk of complications - May be performed electively as a **second-stage procedure** or in patients not candidates for reconstructive surgery *Right hemicolectomy* - Removes only the **right side of the colon** (cecum, ascending colon, and part of transverse colon) - Inappropriate for ulcerative colitis, which is a **pan-colonic disease** that always involves the rectum and extends proximally - Inadequate resection would leave diseased colon in place *Left hemicolectomy* - Removes only the **left side of the colon** (descending colon and part of transverse colon) - Inadequate for ulcerative colitis as it doesn't address the **entire diseased colon** - Would leave inflamed segments and the **always-involved rectum** in place
Question 6: Which of the following drugs is least effective or not typically used in the treatment of ulcerative colitis?
- A. Corticosteroids
- B. Azathioprine
- C. Sulfasalazine
- D. Methotrexate (Correct Answer)
Explanation: ***Methotrexate*** - **Methotrexate** is not a primary or highly effective treatment for ulcerative colitis compared to other immunomodulators. - While it sees use in Crohn's disease, its efficacy in **ulcerative colitis** is limited and generally not recommended. *Corticosteroids* - **Corticosteroids** are highly effective for inducing remission in moderate to severe ulcerative colitis due to their potent anti-inflammatory effects. - They are used for short-term control of flares but not for long-term maintenance due to significant side effects. *Azathioprine* - **Azathioprine** is an effective immunomodulator used for maintaining remission in ulcerative colitis, often as a steroid-sparing agent. - It works by suppressing the immune system over time, reducing the frequency and severity of disease flares. *Sulfasalazine* - **Sulfasalazine** is a 5-aminosalicylate (5-ASA) drug that is a cornerstone of treatment for mild to moderate ulcerative colitis. - It works topically in the colon to reduce inflammation and is used for both induction and maintenance of remission.
Question 7: A 25-year-old woman presents with bloody diarrhea and is diagnosed with ulcerative colitis. Which of the following conditions is least likely to be associated with it?
- A. Iritis
- B. Ankylosing spondylitis
- C. Pancreatitis (Correct Answer)
- D. Sclerosing cholangitis
Explanation: ***Pancreatitis*** - While **pancreatitis** can occur with inflammatory bowel disease, it is generally considered a less common extraintestinal manifestation of **ulcerative colitis**. [1] - Other conditions like primary sclerosing cholangitis and ocular/arthritic manifestations have a stronger and more frequent association. [2] *Sclerosing cholangitis* - **Primary sclerosing cholangitis (PSC)** is strongly associated with ulcerative colitis, affecting a significant portion of patients. [3] - It involves progressive inflammation and fibrosis of the **bile ducts**, leading to cholestasis and liver damage. [3] *Iritis* - **Iritis** (anterior uveitis) is a known extraintestinal manifestation of inflammatory bowel disease, including ulcerative colitis. [2] - It presents with **eye pain, redness, and photophobia**, and requires prompt ophthalmologic evaluation. [2] *Ankylosing spondylitis* - **Ankylosing spondylitis** is a seronegative spondyloarthropathy that has a strong association with ulcerative colitis. [4] - It causes **chronic inflammatory back pain** and stiffness, predominantly affecting the spine and sacroiliac joints. [4]
Question 8: The differentiating feature between IBS and organic GI disease is:
- A. Pain abdomen
- B. Mucus in stools
- C. Diarrhea
- D. Presence of inflammation indicated by elevated stool calprotectin (Correct Answer)
Explanation: ***Presence of inflammation indicated by elevated stool calprotectin*** - Elevated **stool calprotectin** is a reliable biomarker for **gastrointestinal inflammation**, indicating an **organic GI disease** such as inflammatory bowel disease (IBD). - **Irritable bowel syndrome (IBS)** is a functional disorder and typically does not involve **inflammation**, so stool calprotectin levels would be normal. *Diarrhea* - **Diarrhea** can be a symptom of both **IBS** (specifically IBS-D) and various **organic GI diseases** (e.g., Crohn's disease, ulcerative colitis, celiac disease) [1]. - Therefore, its presence alone does not differentiate between a functional and an organic cause [1]. *Pain abdomen* - **Abdominal pain** is a cardinal symptom of **IBS**, specifically related to bowel movements [1]. - It is also a very common symptom in many **organic GI diseases**, making it a non-specific differentiating feature. *Mucus in stools* - **Mucus in stools** can occur in **IBS**, often due to increased colonic transit or irritation, but without underlying inflammation [1]. - It can also be present in **organic GI diseases**, particularly those involving inflammation or structural changes in the bowel.
Question 9: Which extra-intestinal symptom of inflammatory bowel disease worsens with exacerbation of disease activity?
- A. Primary sclerosing cholangitis
- B. Uveitis
- C. Arthritis (Correct Answer)
- D. Erythema nodosum
Explanation: ***Arthritis*** - **Peripheral arthritis** associated with inflammatory bowel disease (IBD) often **worsens with intestinal disease exacerbations** and improves with resolution of flares [1]. - This type of arthritis typically affects larger joints and is **non-deforming and asymmetric**. *Erythema nodosum* - **Erythema nodosum**, a skin manifestation, is generally **correlated with IBD activity** and usually improves as the bowel disease is treated [1]. - It presents as **tender, red nodules** on the shins and is not consistently one of the symptoms that *worsens* with exacerbation, but rather is *present* during active disease. *Primary sclerosing cholangitis* - **Primary sclerosing cholangitis (PSC)** is a chronic liver condition that is **associated with IBD**, particularly ulcerative colitis. - However, the progression of PSC is largely **independent of the intestinal disease activity** and does not necessarily worsen during IBD exacerbations. *Uveitis* - **Uveitis**, an inflammation of the eye's middle layer, is an extra-intestinal manifestation of IBD that can occur **independently of intestinal disease activity**. - It does not consistently worsen during IBD exacerbations and may require separate focused treatment.
Question 10: Which X-ray finding is more suggestive of ulcerative colitis than Crohn's disease?
- A. Rectal sparing
- B. Tracking of contrast within the bowel wall
- C. Discontinuous lesions
- D. Loss of haustrations (Correct Answer)
Explanation: ***Loss of haustrations*** - **Loss of haustrations**, also known as "lead pipe" appearance, is a classic X-ray finding in **ulcerative colitis**. - This indicates chronic inflammation leading to fibrosis and shortening of the colon, which obliterates the normal haustral markings. *Rectal sparing* - **Rectal sparing** is more characteristic of **Crohn's disease**, as ulcerative colitis typically involves the rectum and extends proximally. - While rare, some cases of ulcerative colitis can spare the rectum, but it is not the typical presentation seen on imaging. *Tracking of contrast within the bowel wall* - **Tracking of contrast within the bowel wall** (e.g., fistulas, sinus tracts) is a hallmark feature of **Crohn's disease**. - This indicates **transmural inflammation**, which is characteristic of Crohn's disease but not usually seen in ulcerative colitis. *Discontinuous lesions* - **Discontinuous lesions**, also known as "skip lesions," are a classic feature of **Crohn's disease**. - **Ulcerative colitis** is characterized by **continuous inflammation** that starts in the rectum and extends proximally without skipped areas.
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