Gastrointestinal Pathology Practice Questions

Q: Collar button ulcer is found in?

Ulcerative colitis. ***Ulcerative colitis*** - **Collar button ulcers** are a classic and characteristic gross pathological finding in ulcerative colitis - These ulcers have a distinctive morphology: a narrow opening at the mucosal surface with a wider base that undermines the surrounding mucosa, creating a flask-shaped or "collar button" appearance - The undermining occurs because the inflammatory infiltrate in the lamina propria causes mucosal detachment, while the surface epithelium remains relatively intact initially - This is a hallmark feature described in standard pathology texts and frequently tested in medical examinations *Crohn's disease* - Crohn's disease shows transmural inflammation with different ulcer patterns including linear/serpentine ulcers, aphthous ulcers, and deep fissuring ulcers - The characteristic appearance is "cobblestone mucosa" due to linear ulcers with intervening edematous mucosa - Does NOT characteristically show collar button ulcers - the morphology is fundamentally different *Shigella* - Shigella infection causes acute infectious colitis with superficial mucosal ulceration and pseudomembrane formation - The ulceration is typically diffuse and superficial, not showing the characteristic undermining pattern of collar button ulcers - The inflammatory process differs from the chronic undermining seen in ulcerative colitis *All of the options* - Incorrect, as collar button ulcers are specifically characteristic of ulcerative colitis - While other conditions cause colonic ulceration, they have different morphological patterns

Q: Which condition is characterized by skip lesions in the gastrointestinal tract?

Crohn's disease. ***Crohn's disease*** [1] - Characterized by **skip lesions** which are segmental areas of inflammation interspersed with normal bowel, consistent with the presence of **granulomatous inflammation** [1][2][3]. - It can affect any part of the gastrointestinal tract [1], often leading to chronic symptoms like **abdominal pain** and **diarrhea**. *Reiter's disease* - Primarily manifests as **arthritis**, **urethritis**, and **conjunctivitis**, without granulomatous lesions. - It is a reactive arthritis often associated with infection rather than inflammatory bowel disease. *Ulcerative colitis* - Characterized by continuous lesions of the colon and does not exhibit the **skip lesions** typical of Crohn's disease. - Mainly involves the **mucosal layer** and is associated with symptoms like **bloody diarrhea** and mucosal ulceration. *Whipple's disease* - Caused by *Tropheryma whipplei*, leading to **malabsorption syndrome**; however, it is not associated with skip lesions. - It typically involves the **gut mucosa** and has systemic manifestations, rather than the localized granulomatous lesions seen in Crohn's disease. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 365-366. [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.

Q: A 5-year-old child was admitted to the hospital for a prolapsing rectal mass and painless rectal bleeding. Histopathological examination reveals enlarged and inflamed glands filled with mucin. What is the likely diagnosis?

Juvenile polyp (Hamartoma). ***Juvenile polyp (Hamartoma)*** - **Juvenile polyps** are the most common cause of rectal bleeding in children, often presenting as a **prolapsing rectal mass** and **painless bleeding**. - Histologically, they are characterized by **enlarged, inflamed glands filled with mucin**, consistent with a hamartomatous origin. *Adenoma (precancerous lesion in adults)* - While adenomas can cause rectal bleeding and prolapse, they are typically found in **adults** and are considered **precancerous lesions** [1]. - The patient's young age (5-year-old) makes an adenoma highly unlikely [1]. *Carcinoma (malignant tumor, rare in children)* - **Colorectal carcinoma** is exceedingly **rare in children** and usually presents with more aggressive symptoms than painless bleeding, such as weight loss or anemia [2]. - The histological description of inflamed, mucin-filled glands is not typical for carcinoma [2]. *Choristoma (benign growth of normal tissue in an abnormal location)* - A **choristoma** is a benign growth of normal tissue in an abnormal location, but it does not typically present as a rectal mass or cause rectal bleeding. - The microscopic findings of enlarged and inflamed glands filled with mucin are not characteristic of a choristoma. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 371-372. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 821-822.

Q: A 5-year-old child presented with a history of blood in the stools. On examination, there was a polypoid mass in the rectum, a biopsy of which showed as below. The most probable diagnosis is?

Juvenile polyp. ***Juvenile polyp*** - The image shows **dilated, cystically appearing glands** within an inflamed lamina propria, which is characteristic of a juvenile polyp. - Juvenile polyps are the most common cause of **rectal bleeding** in children under 10 years of age and are typically benign. *Villous adenoma* - Villous adenomas are **neoplastic polyps** with a **villous (finger-like) architecture** and are more commonly seen in older adults [1]. - They typically show **dysplastic changes** and are considered premalignant [1]. *Vascular malformation* - Vascular malformations consist of **abnormally formed blood vessels** (e.g., arteriovenous malformations, hemangiomas) and would appear as dilated or aberrant vessels on histology. - While they can cause bleeding, the image does not show a predominance of vascular structures. *Serrated adenoma* - Serrated adenomas are characterized by **sawtooth-like glandular infoldings** and show varying degrees of dysplasia. - They are typically found in adults and are considered premalignant, not benign growths usually found in children. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 371-372.

Q: Identify the condition shown in the image.

Peutz-Jeghers syndrome. ***Juvenile polyp*** - Juvenile polyps are commonly found in children and present as **solitary lesions**, usually in the rectum [1]. - They typically appear **smooth**, with a characteristic lobulated surface, emphasizing their benign nature. *Villous adenoma* - Villous adenomas are characterized by **frond-like projections** and have a higher risk of malignant transformation [2]. - These lesions usually occur in adults and are typically larger and more **invasive** compared to juvenile polyps [2]. *Hyperplastic polyp* - Hyperplastic polyps are small, **benign lesions** that result from epithelial overgrowth with a typical **smooth surface** [3]. - They are usually found in the colon and do not present with the distinctive features of juvenile polyps. *Peutz-Jeghers polyp* - Peutz-Jeghers polyps are associated with **Peutz-Jeghers syndrome** and exhibit a **hamartomatous** appearance, often protruding from various gastrointestinal sites [1]. - These polyps are typically more **complex** and can be found in older children and adults, differing significantly from juvenile polyps [1]. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, p. 813. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 371-372. [3] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 811-813.

Q: Which of the following statements about Barrett’s esophagus is false?

Causes adenocarcinoma. ***Causes adenocarcinoma*** - Barrett's esophagus itself is a **precursor lesion**, not a definitive cause of adenocarcinoma; it significantly increases the risk of this malignancy [1]. - It manifests due to **intestinal metaplasia** in the lower esophagus, which can progress to **dysplasia** and eventually cancer [1]. *Patient is usually asymptomatic* - Many patients may be **asymptomatic** or have mild symptoms; however, this statement is misleading as Barrett's esophagus can present with **symptoms of GERD** [2]. - The presence of **gastroesophageal reflux disease (GERD)** is common, which could lead to symptoms despite the condition itself being silent [2]. *Histology of the lesion shows mucus secreting goblet cells* - While goblet cells are present in Barrett's esophagus lesions, this statement can be misleading because it implies that their presence alone is definitive for diagnosis. - Correctly, the presence of **intestinal-type mucosa** with goblet cells is a hallmark feature [1], but it should be evaluated in the context of the overall histological assessment. *Chronic gastroesophageal reflux is a predisposing factor* - Barrett's esophagus is strongly associated with **chronic gastroesophageal reflux disease (GERD)**, which is a key risk factor for its development [1]. - The reflux of **acidic gastric contents** damages the esophageal lining, leading to metaplastic changes, hence establishing a link between GERD and Barrett's esophagus [1]. **References:** [1] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 348-349. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 764-765.

Q: Which histological feature is more characteristically associated with Ulcerative Colitis compared to Crohn's Disease?

Crypt abscesses in the mucosa. ***Crypt abscess*** - The presence of **crypt abscesses** is a distinguishing histological feature of **ulcerative colitis**, indicating **inflammation** within the crypts [1]. - This feature is not characteristic of Crohn's disease, which presents with a patchy distribution of inflammation [3]. *Diffuse distribution of pseudopolyps* - While **pseudopolyps** can occur in ulcerative colitis, they are **not histological differences** but rather **morphological features** observed in cases of longstanding disease. - Crohn's disease typically shows **skip lesions**, which contrasts with the more extensive mucosal changes seen in ulcerative colitis [3]. *Lymphoid aggregates in the mucosa* - Lymphoid aggregates are more commonly found in **Crohn's disease**, where they suggest the presence of a **transmural inflammatory process** [2,3]. - In ulcerative colitis, there is a more uniform mucosal inflammation and an absence of significant lymphoid aggregation [3]. *Mucosal edema* - Mucosal edema can appear in both conditions but does **not provide a clear histological difference** between ulcerative colitis and Crohn's disease. - The edema is more related to the **acute inflammatory response** rather than a differential histological feature. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, p. 809. [2] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 806-807. [3] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 365-368.

Q: In a patient presenting with gallbladder abnormalities, which condition is characterized by a speckled appearance of the gallbladder mucosa resembling a strawberry?

Cholesterolosis of the gallbladder. ***Cholesterolosis of the gallbladder*** - This condition is characterized by the accumulation of **cholesterol esters** and **triglycerides** within macrophages in the lamina propria of the gallbladder, creating a **speckled appearance** often referred to as a "**strawberry gallbladder**". - It is typically asymptomatic but can be associated with **cholelithiasis** (gallstones) in some cases. *Gangrene of the gallbladder* - This is a severe complication of **acute cholecystitis** where the gallbladder tissue dies due to **ischemia**, often appearing necrotic and dark, not speckled. - It presents with severe abdominal pain, fever, and signs of **sepsis**, which is distinct from a speckled appearance. *Porcelain gallbladder* - This condition involves **extensive calcification of the gallbladder wall**, making it brittle and rigid, and is often associated with an increased risk of gallbladder cancer. - Its appearance is typically hard and white due to calcification, not speckled like a strawberry. *Adenomatosis of the gallbladder* - This term is often used interchangeably with **adenomyomatosis**, which involves **hypertrophy of the muscularis propria** and **outpouchings of the mucosa** (Rokitansky-Aschoff sinuses). - It presents as nodular or diffuse thickening of the gallbladder wall, not a speckled mucosal pattern.

Q: Most significant risk factor for development of gastric carcinoma is

Intestinal metaplasia. ***Intestinal metaplasia*** - **Intestinal metaplasia** is a precursor lesion where gastric epithelium is replaced by intestinal-type epithelium, significantly increasing the risk for **gastric carcinoma** [1][2]. - It is a recognized **high-risk factor**, especially in cases of chronic gastritis and atrophic changes in the stomach lining [1][2]. *Ciliated metaplasia* - This condition is generally associated with **respiratory epithelium** and is not linked to gastric carcinoma risk. - It does not involve gastric epithelial changes, therefore, it does not influence **gastric cancer development**. *Pyloric metaplasia* - Pyloric metaplasia typically occurs in chronic gastritis but does not confer a significant **risk** of gastric carcinoma. - It is more related to gastric mucosa adaptation and does not show the same risk association as **intestinal metaplasia**. *Paneth cell metaplasia* - Paneth cell metaplasia is primarily seen in **intestinal disorders** and does not serve as an indicator for gastric carcinoma. - It does not reflect changes in gastric epithelium that are related to cancer risk in the stomach. **References:** [1] Kumar V, Abbas AK, et al.. Robbins and Cotran Pathologic Basis of Disease. 9th ed. The Gastrointestinal Tract, pp. 777-778. [2] Cross SS. Underwood's Pathology: A Clinical Approach. 6th ed. Common Clinical Problems From Alimentary System Disease, pp. 354-355.

Q: Centrilobular necrosis of the liver may be seen with?

CCl4. ***CCl4*** - **Carbon tetrachloride (CCl4)** is the **classic and prototypical** hepatotoxin that causes **centrilobular (zone 3) necrosis**. - The **centrilobular zone (zone 3)** is particularly vulnerable due to its high concentration of **cytochrome P450 enzymes**, which metabolize CCl4 into **toxic free radicals (trichloromethyl radicals)**. - This is the **most characteristic** cause of centrilobular necrosis in toxicology and is the preferred answer for exam purposes. *Ethanol* - **Ethanol** can also cause **centrilobular necrosis** in **alcoholic hepatitis**, as zone 3 is most susceptible to hypoxic injury and oxidative stress. - However, alcoholic liver disease presents with a **spectrum of changes** including steatosis (earliest), hepatitis with ballooning degeneration and Mallory-Denk bodies, and eventual cirrhosis. - While centrilobular necrosis occurs in alcoholic hepatitis, **CCl4 remains the prototype** for pure centrilobular necrosis in exam contexts. *Phosphorus* - **Elemental phosphorus** toxicity causes **periportal (zone 1) necrosis**, which is the opposite pattern from centrilobular necrosis. - It also causes widespread fatty change and hemorrhagic necrosis within the liver. *Arsenic* - **Arsenic poisoning** causes **diffuse/generalized hepatocellular necrosis** and cholestasis, rather than the specific centrilobular pattern. - Chronic exposure is associated with non-cirrhotic portal fibrosis and portal hypertension.

Question 1

Collar button ulcer is found in?

Accepted Answer

Ulcerative colitis

Answer

Shigella

Answer

Crohn's disease

Answer

All of the options

Question 2

Which condition is characterized by skip lesions in the gastrointestinal tract?

Accepted Answer

Crohn's disease

Answer

Ulcerative colitis

Answer

Whipple's disease

Answer

Reactive arthritis

Question 3

A 5-year-old child was admitted to the hospital for a prolapsing rectal mass and painless rectal bleeding. Histopathological examination reveals enlarged and inflamed glands filled with mucin. What is the likely diagnosis?

Accepted Answer

Juvenile polyp (Hamartoma)

Answer

Adenoma (precancerous lesion in adults)

Answer

Carcinoma (malignant tumor, rare in children)

Answer

Choristoma (benign growth of normal tissue in an abnormal location)

Question 4

A 5-year-old child presented with a history of blood in the stools. On examination, there was a polypoid mass in the rectum, a biopsy of which showed as below. The most probable diagnosis is?

Accepted Answer

Juvenile polyp

Answer

Villous adenoma

Answer

Vascular malformation

Answer

Serrated adenoma

Question 5

Identify the condition shown in the image.

Accepted Answer

Peutz-Jeghers syndrome

Answer

Villous adenoma

Answer

Hyperplastic polyp

Answer

Juvenile polyp

Question 6

Which of the following statements about Barrett’s esophagus is false?

Accepted Answer

Causes adenocarcinoma

Answer

Chronic gastroesophageal reflux is a predisposing factor

Answer

Patient is usually asymptomatic

Answer

Histology of the lesion shows mucus secreting goblet cells

Question 7

Which histological feature is more characteristically associated with Ulcerative Colitis compared to Crohn's Disease?

Accepted Answer

Crypt abscesses in the mucosa

Answer

Presence of pseudopolyps in the mucosa

Answer

Mucosal edema and inflammation

Answer

Lymphoid aggregates in the submucosa

Question 8

In a patient presenting with gallbladder abnormalities, which condition is characterized by a speckled appearance of the gallbladder mucosa resembling a strawberry?

Accepted Answer

Cholesterolosis of the gallbladder

Answer

Gangrene of the gallbladder

Answer

Porcelain gallbladder

Answer

Adenomatosis of the gallbladder

Question 9

Most significant risk factor for development of gastric carcinoma is

Accepted Answer

Intestinal metaplasia

Answer

Pyloric metaplasia

Answer

Ciliated metaplasia

Answer

Paneth cell metaplasia

Question 10

Centrilobular necrosis of the liver may be seen with?

Accepted Answer

CCl4

Answer

Arsenic

Answer

Ethanol

Answer

Phosphorus

Gastrointestinal Pathology — MCQs

Gastrointestinal Pathology — MCQs

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