Gastroenterology Practice Questions

Q: Which of the following is the site of venous thrombosis in Budd-Chiari syndrome?

Hepatic vein. ***Hepatic vein*** - **Budd-Chiari syndrome** is specifically defined by **thrombosis of the hepatic veins** [3] or the suprahepatic inferior vena cava, obstructing venous outflow from the liver. - This obstruction leads to **hepatic congestion** [2], liver enlargement, abdominal pain, and ascites. *Infrahepatic inferior vena cava* - While thrombosis can occur in the inferior vena cava, if it is located **below the liver**, it would not directly cause the classic features of Budd-Chiari syndrome. - Obstruction at this level would primarily lead to **lower extremity edema** and potentially renal vein thrombosis. *Infrarenal inferior vena cava* - Thrombosis in the **infrarenal portion of the IVC** would cause symptoms in the lower body, such as leg swelling [3], but not the hepatic congestion characteristic of Budd-Chiari syndrome. - This condition is distinct and typically presents with symptoms localized to the **inferior vena cava drainage area below the kidneys**. *Portal vein* - **Portal vein thrombosis** causes **portal hypertension** but does not directly involve the hepatic veins [1]. - While it can lead to ascites, it does not typically cause the acute, severe hepatic necrosis and sinusoidal congestion seen in Budd-Chiari syndrome as liver outflow is not obstructed.

Q: Which of the following statements about ulcerative colitis is correct?

Most commonly involves the colon. ***Most commonly involves the colon*** - **Ulcerative colitis** is a chronic inflammatory disease primarily affecting the **colon** and rectum [1]. - Inflammation typically starts in the rectum and extends proximally in a continuous fashion [1]. *Affects only the mucosal layer of the colon* - While ulcerative colitis primarily affects the **mucosal and submucosal layers**, severe cases can extend deeper into the muscularis propria, distinguishing it from Crohn's disease which is transmural [1]. - This statement is too absolute as inflammation can infrequently extend beyond just the mucosal layer. *Can involve the perianal region* - **Perianal involvement**, such as **fistulas, abscesses**, and **skin tags**, is characteristic of **Crohn's disease**, not ulcerative colitis [1]. - Ulcerative colitis inflammation is contiguous and limited to the colon. *Skip lesions are commonly seen* - **Skip lesions**, defined as areas of inflammation separated by segments of healthy tissue, are a hallmark feature of **Crohn's disease**. - **Ulcerative colitis** is characterized by **continuous inflammation** that starts in the rectum and extends upwards [1].

Q: Which condition is associated with the highest risk of colorectal cancer?

Familial polyposis. ***Familial polyposis*** - Familial polyposis, particularly **Familial Adenomatous Polyposis (FAP)**, is associated with a nearly **100% risk of colorectal cancer** if untreated due to the development of numerous adenomatous polyps [1]. - Patients with FAP typically require **prophylactic colectomy** due to this high risk [1]. *Crohn's disease* - While Crohn's disease does increase the risk of colorectal cancer, the risk is **lower** compared to conditions like familial polyposis. - Colorectal cancer develops more commonly in long-standing cases and with **persistence of inflammation**. *Ulcerative colitis* - Ulcerative colitis also carries an increased risk for colorectal cancer, but it requires a longer duration of disease (often **over 8 years**) to significantly increase risk. - Cancer risk in ulcerative colitis is related to the extent of **colonic involvement**, making it less severe than familial polyposis. *Infantile polyp* - Infantile polyps are benign growths occurring in children and are generally **not associated with increased colorectal cancer risk** [1]. - These polyps usually **do not progress** to malignancy and are often discovered incidentally.

Q: The drug used in steroid-refractory acute severe ulcerative colitis is:

Cyclosporine. ***Cyclosporine*** - **Cyclosporine** is an effective **calcineurin inhibitor** used in cases of **acute severe ulcerative colitis** that are refractory to steroid therapy [1]. - It acts by suppressing the immune system and reducing inflammation in the colon, thereby preventing colectomy [1]. *Sulfasalazine* - **Sulfasalazine** is an **aminosalicylate** commonly used for mild to moderate ulcerative colitis, particularly for maintaining remission [1]. - It is not considered a primary treatment for **acute severe, steroid-refractory** disease [1]. *Steroids* - The question explicitly states "steroid-refractory," meaning the patient has already failed **steroid therapy** [1]. - Therefore, using **steroids** again as the primary intervention for this specific clinical scenario would not be appropriate. *Infliximab* - **Infliximab**, an **anti-TNF-α agent**, is also used in steroid-refractory acute severe ulcerative colitis [1]. - However, **cyclosporine** has a **more rapid onset of action** which makes it a preferred initial option in severe cases; Infliximab is often considered after cyclosporine failure or in scenarios where cyclosporine is contraindicated.

Q: Which of the following is not typically used in the management of pneumatosis cystoides intestinalis?

Albendazole. ***Albendazole*** - **Albendazole** is an **anti-parasitic medication** used to treat helminthic infections [2]. - While parasitic infections can sometimes cause gastrointestinal symptoms, it is not a standard treatment for **pneumatosis cystoides intestinalis**, which primarily involves gas cysts in the bowel wall. *High flow oxygen* - **High flow oxygen** is a common and effective treatment for pneumatosis cystoides intestinalis. - It works by increasing the partial pressure of nitrogen in the blood, creating a **diffusion gradient** that promotes the absorption of nitrogen gas from the cysts in the bowel wall. *Metronidazole* - **Metronidazole** is an antibiotic that is often used in the management of pneumatosis cystoides intestinalis, especially when bacterial overgrowth or infection is suspected. - It can help to reduce gas production by **anaerobic bacteria** in the gut, which may contribute to the formation of gas cysts. *Sulfasalazine* - **Sulfasalazine** is an anti-inflammatory drug used in the treatment of inflammatory bowel diseases (IBD) like ulcerative colitis and Crohn's disease [1]. - In cases where pneumatosis cystoides intestinalis is secondary to an **inflammatory bowel condition**, sulfasalazine may be used to address the underlying inflammation that might be contributing to the gas cysts [1].

Q: Most effective medication in Gastroesophageal Reflux Disease (GERD) is:

PPI. ***PPI*** - **Proton pump inhibitors (PPIs)** are considered the most effective medications for GERD because they **irreversibly block the H+/K+-ATPase pump** in gastric parietal cells, leading to substantial and prolonged reduction in acid secretion. [1] - This profound acid suppression promotes **healing of esophageal erosions** and provides superior symptom relief compared to other drug classes. [1] *Antacids* - **Antacids** neutralize existing stomach acid, providing **rapid but temporary symptomatic relief**. [1] - They do not inhibit acid production and are **ineffective for long-term management** or healing of esophageal damage in GERD. *Prokinetic drugs* - **Prokinetic agents** enhance esophageal motility and gastric emptying, which can be beneficial in some GERD patients by reducing acid exposure. - However, they do **not reduce acid secretion** and are generally less effective than PPIs for primary GERD treatment. *H2 blockers* - **H2-receptor antagonists (H2 blockers)** reduce stomach acid production by blocking histamine H2 receptors on parietal cells, leading to a moderate decrease in acid secretion. - While effective for mild GERD, they are generally **less potent and provide less sustained acid suppression** than PPIs [1], and patients can develop **tachyphylaxis** (tolerance) to their effects.

Q: Most common presentation of Peutz-Jeghers syndrome is

Intussusception due to hamartomatous polyps. ***Intussusception due to hamartomatous polyps*** - **Intussusception** is a common and often the first clinical manifestation of Peutz-Jeghers syndrome, caused by the characteristic **hamartomatous polyps** acting as a lead point [1]. - These polyps, particularly in the small intestine, can prolapse into an adjacent segment of the bowel, leading to bowel obstruction and pain [1]. *Increased risk of pancreatic cancer* - While patients with Peutz-Jeghers syndrome do have an **increased risk of various cancers**, including pancreatic cancer, this is not the most common initial presentation [2]. - Cancer development typically occurs later in life, whereas intussusception can occur in childhood or early adulthood. *Increased risk of melanoma* - Peutz-Jeghers syndrome is primarily associated with an increased risk of gastrointestinal and other visceral cancers, not typically with an **increased risk of melanoma**. - The distinctive **mucocutaneous pigmentation** seen in PJS can be mistaken for other pigmented lesions, but it is not indicative of melanoma risk. *Bowel malabsorption issues* - Although the polyps can sometimes cause bleeding or abdominal pain, **significant malabsorption** is not a characteristic or common direct presentation of Peutz-Jeghers syndrome. - Malabsorption might be a secondary complication in severe, rare cases following extensive resections or severe chronic inflammation, but not a primary presentation.

Q: A patient is admitted to the hospital with complaints of nausea, vomiting, diarrhoea, and severe abdominal pain. Which of the following diagnostic tests would help confirm that the patient has bleeding from the gastrointestinal tract?

Guaiac test for occult blood.. ***Guaiac test for occult blood*** - The **Guaiac test** detects invisible amounts of blood in the stool, which is characteristic of **occult gastrointestinal bleeding** [2]. - This test is crucial when overt signs like **hematemesis** or **melena** are not yet present, but GI bleeding is suspected based on other symptoms like abdominal pain, nausea, and vomiting [3]. *Presence of hematemesis (vomiting blood)* - While **hematemesis** is a clear sign of upper GI bleeding, it is a clinical observation, not a diagnostic test [1]. - Its presence directly confirms macroscopic bleeding, but the question asks for a **diagnostic test** to confirm bleeding, particularly when it might be occult. *Observation of melena (black, tarry stools)* - **Melena** indicates black, tarry stools resulting from digested blood, strongly suggesting upper GI bleeding [2]. This is a clinical symptom, not a diagnostic test - While informative, like hematemesis, it is an overt symptom and not a diagnostic test performed in a lab or clinical setting to confirm the presence of blood. *Hematochezia (bright red blood in stool)* - **Hematochezia** signifies the passage of bright red blood from the rectum, typically indicating lower GI bleeding. This is a clinical symptom and not a diagnostic test - As with hematemesis and melena, hematochezia is a clinical manifestation of bleeding rather than a diagnostic test.

Q: Which of the following statements about celiac disease is false?

Celiac disease is caused by a viral infection.. ### Celiac disease is caused by a viral infection - Celiac disease is an **autoimmune disorder**, not a viral infection, triggered by the ingestion of **gluten** in genetically predisposed individuals [1]. - The immune response causes inflammation and damage to the **small intestinal lining**. ### Diarrhea, Malabsorption, iron deficiency anaemia - These are **classic symptoms** and common complications of celiac disease due to the damage to the small intestinal villi, impairing nutrient absorption [1]. - **Malabsorption** leads to various deficiencies, including iron deficiency anemia [2]. ### Diagnosis requires duodenal biopsy showing villous atrophy - A definitive diagnosis typically involves an **endoscopic biopsy** of the small intestine, which reveals characteristic findings like **villous atrophy**, crypt hyperplasia, and increased intraepithelial lymphocytes [1]. - This **histological evidence** is crucial for confirming the diagnosis. ### Patients express HLA DQ2 or DQ8 haplotypes - The presence of **HLA-DQ2 or HLA-DQ8 Class II major histocompatibility complex (MHC) allelic variants** is a strong genetic predisposition for celiac disease [1]. - While necessary, these **haplotypes** are not sufficient for diagnosis, as many individuals with these genes never develop the condition.

Question 1

A 40-year-old woman with Crohn's disease reports multiple bowel movements with frequent stools. She was previously treated with a mesalamine derivative "Pentasa" and in the latest episode of the disease flare-up, she didn't tolerate the oral steroid therapy with budesonide. What is the next appropriate step in her treatment?

Accepted Answer

Azathioprine

Answer

Sulfasalazine

Answer

Prednisolone (oral)

Answer

Hydrocortisone (IV)

Question 2

Which of the following is the site of venous thrombosis in Budd-Chiari syndrome?

Accepted Answer

Hepatic vein

Answer

Infrahepatic inferior vena cava

Answer

Infrarenal inferior vena cava

Answer

Portal vein

Question 3

Which of the following statements about ulcerative colitis is correct?

Accepted Answer

Most commonly involves the colon

Answer

Can involve the perianal region

Answer

Affects only the mucosal layer of the colon

Answer

Skip lesions are commonly seen

Question 4

Which condition is associated with the highest risk of colorectal cancer?

Accepted Answer

Familial polyposis

Answer

Crohn's disease

Answer

Ulcerative colitis

Answer

Infantile polyp

Question 5

The drug used in steroid-refractory acute severe ulcerative colitis is:

Accepted Answer

Cyclosporine

Answer

Steroids

Answer

Infliximab

Answer

Sulfasalazine

Question 6

Which of the following is not typically used in the management of pneumatosis cystoides intestinalis?

Accepted Answer

Albendazole

Answer

Sulfasalazine

Answer

Metronidazole

Answer

High flow oxygen

Question 7

Most effective medication in Gastroesophageal Reflux Disease (GERD) is:

Accepted Answer

PPI

Answer

Antacids

Answer

Prokinetic drugs

Answer

H2 blockers

Question 8

Most common presentation of Peutz-Jeghers syndrome is

Accepted Answer

Intussusception due to hamartomatous polyps

Answer

Increased risk of pancreatic cancer

Answer

Increased risk of melanoma

Answer

Bowel malabsorption issues

Question 9

A patient is admitted to the hospital with complaints of nausea, vomiting, diarrhoea, and severe abdominal pain. Which of the following diagnostic tests would help confirm that the patient has bleeding from the gastrointestinal tract?

Accepted Answer

Guaiac test for occult blood.

Answer

Observation of melena (black, tarry stools)

Answer

Presence of hematemesis (vomiting blood)

Answer

Hematochezia (bright red blood in stool)

Question 10

Which of the following statements about celiac disease is false?

Accepted Answer

Celiac disease is caused by a viral infection.

Answer

Diagnosis requires duodenal biopsy showing villous atrophy

Answer

Diarrhea, Malabsorption, iron deficiency anaemia

Answer

Patients express HLA DQ2 or DQ8 haplotypes

Gastroenterology — MCQs

Gastroenterology — MCQs

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