Gastroenterology Practice Questions

Q: A 45-year-old man is complaining of vomiting, with vomitus consisting of food mass taken a few days back, foul-smelling breath, and occasional dysphagia to solid food. What is the diagnosis?

Zenker's diverticulum. ***Zenker's diverticulum*** - The classic presentation includes **halitosis** (foul-smelling breath), **regurgitation of undigested food** eaten days prior, and **dysphagia to solids**, all consistent with food accumulation in a pharyngeal pouch [1]. - This condition is an **outpouching of the posterior pharyngeal wall** (false diverticulum) due to herniation of mucosa through Killian's triangle. *Scleroderma* - While it can cause **dysphagia**, the primary mechanism is **esophageal dysmotility with impaired peristalsis** and lower esophageal sphincter incompetence, leading to heartburn and strictures [1]. - It does not typically cause food regurgitation from days prior or significant halitosis in the absence of severe reflux. *Achalasia cardia* - Characterized by **dysphagia to both solids and liquids**, and regurgitation of food, but the food is typically recently ingested, not from several days prior [1]. - The underlying pathology is **failure of the lower esophageal sphincter to relax** and loss of esophageal peristalsis, leading to esophageal dilation [1]. *Diabetic gastroparesis* - Involves **delayed gastric emptying** due to autonomic neuropathy, causing symptoms like nausea, vomiting, early satiety, and bloating. - The vomiting would be of recently ingested food and would not typically include food eaten "days back" or present with significant dysphagia localized to the pharynx unless complications arise.

Q: Which specific condition is a significant risk factor associated with cholangiocarcinoma?

Primary sclerosing cholangitis. ***Primary sclerosing cholangitis*** - **Primary sclerosing cholangitis (PSC)** is a chronic cholestatic liver disease characterized by inflammation, fibrosis, and stricturing of the bile ducts, which significantly increases the risk of **cholangiocarcinoma** [1]. - Up to 10-15% of patients with PSC will develop cholangiocarcinoma, making it the most significant risk factor for this malignancy. *Obesity* - While **obesity** is a risk factor for several cancers, including hepatocellular carcinoma and colorectal cancer, its direct association with cholangiocarcinoma is less significant compared to PSC. - Obesity is more broadly linked to conditions like **non-alcoholic fatty liver disease (NAFLD)** and metabolic syndrome, which can indirectly contribute to liver disease. *Salmonella carrier state* - Chronic **Salmonella carrier state** has been identified as a risk factor for **gallbladder cancer**, particularly in endemic areas. - However, its association with **cholangiocarcinoma**, which arises from the bile ducts, is not as strong or specific as that of PSC. *HBV infection* - **Hepatitis B virus (HBV) infection** is a well-established major risk factor for **hepatocellular carcinoma (HCC)**, a primary liver cancer. - While chronic liver inflammation from HBV can increase the risk of other liver-related complications, its direct and significant association with **cholangiocarcinoma** is not as prominent as with HCC.

Q: Which of the following variables is least predictive of 6-week mortality?

Age > 50. ***Age > 50*** - While older age is generally associated with increased risk, **age alone is a less specific predictor** of acute 6-week mortality compared to markers of severe liver dysfunction or clinical complications. - The impact of age is often mediated by the presence of comorbidities or the severity of the underlying liver disease itself. *Child-Pugh class C* - **Child-Pugh Class C** indicates severe liver dysfunction, characterized by significant ascites, encephalopathy, and abnormal coagulation. [1] - It is a strong predictor of **short-term mortality** (including 6-week mortality) due to the profound impact of extensive liver failure. [1] *MELD score > 18* - A **MELD score > 18** reflects severe liver disease based on bilirubin, creatinine, and INR, indicating significant hepatic and renal impairment. [1] - This score is directly correlated with **increased mortality risk** and is widely used for prioritizing liver transplant candidates. [1] *Early rebleeding* - **Early rebleeding** after an initial variceal bleed is a major complication that significantly increases the risk of **short-term mortality**. [1] - It is a critical post-hemorrhage event often leading to further hemodynamic instability, aspiration, and hepatic decompensation. [1]

Q: Increased gastrin is seen in what conditions?

Zollinger-Ellison syndrome. ***Zollinger-Ellison syndrome*** - This syndrome is characterized by a **gastrin-secreting tumor (gastrinoma)**, often located in the pancreas or duodenum [1]. - The excess gastrin leads to **hypersecretion of gastric acid**, causing severe and refractory peptic ulcers [1]. *Iron deficiency anaemia* - While iron deficiency may occur due to **chronic blood loss from peptic ulcers** [3], it does not directly cause increased gastrin levels. - Gastrin plays no direct role in **iron absorption** or red blood cell production. *Duodenal ulcer* - Duodenal ulcers are typically caused by **Helicobacter pylori infection** or NSAID use and involve normal or slightly elevated gastrin levels, not significantly increased levels [2]. - Increased gastrin levels are a cause of severe duodenal ulcers in conditions like Zollinger-Ellison syndrome, rather than a symptom of a typical duodenal ulcer [1]. *Gastric cancer* - Gastric cancer is not typically associated with **elevated gastrin levels**; in fact, some forms, like atrophic gastritis preceding cancer, can lead to decreased acid production and reactive hypergastrinemia, but it's not a primary feature the way it is in Zollinger-Ellison syndrome [1]. - The main focus for this question is a primary and significant increase in gastrin, which gastric cancer does not directly cause.

Q: What is the treatment of choice in duodenal ulcer without any complications of hemorrhage?

Proton pump inhibitors. ***Proton pump inhibitors*** - **Proton pump inhibitors (PPIs)** are the first-line and most effective treatment for uncomplicated duodenal ulcers due to their potent and sustained acid suppression [1]. - They work by irreversibly inhibiting the **H+/K+-ATPase pump** in the stomach's parietal cells, reducing acid secretion and allowing the ulcer to heal [1]. *Highly selective vagotomy* - This is a surgical procedure that was historically used to reduce acid secretion by denervating the acid-producing parietal cells of the stomach, but it is **not the primary treatment** for uncomplicated ulcers today due to the availability of effective medical therapy [1]. - It carries surgical risks and is generally reserved for **refractory cases** or those with complications not amenable to endoscopic or medical management [1]. *Trunkal vagotomy* - **Trunkal vagotomy** involves cutting the main vagal trunks, which leads to significant side effects such as **gastric stasis** (delayed emptying) and diarrhea, often requiring a drainage procedure (e.g., pyloroplasty). - It was used in the past but is **rarely performed** for uncomplicated duodenal ulcers due to its associated morbidity and the effectiveness of modern medical treatments [1]. *None of the options* - This option is incorrect because **proton pump inhibitors** are indeed a highly effective and standard treatment for uncomplicated duodenal ulcers [1].

Q: What is the leading cause of death in patients with Crohn's disease?

Thromboembolic complication. ***Thromboembolic complication*** - Patients with **Crohn's disease** have a significantly increased risk of venous thromboembolism, including **deep vein thrombosis** and **pulmonary embolism**, due to chronic inflammation and hypercoagulability [2]. - This risk is compounded by factors such as immobility, surgery, and certain medications used to treat Crohn's [2]. *Sepsis* - While **sepsis** is a potential complication in Crohn's disease, particularly in cases of bowel perforation or severe infection, it is not the leading cause of death [1]. - Severe inflammation and compromised bowel integrity can lead to bacterial translocation and systemic infection. *Electrolyte disturbance* - **Electrolyte disturbances** can occur due to severe diarrhea, malabsorption, or fistulas in Crohn's disease but are generally manageable with appropriate medical intervention [1]. - They are rarely a direct cause of mortality unless extremely severe and left untreated. *Malignancy* - Patients with Crohn's disease have an increased risk of certain cancers, particularly **colorectal cancer** and **small bowel adenocarcinoma**, but **thromboembolic events** remain the leading cause of death overall [1]. - The risk of malignancy is often related to the duration and extent of inflammation [1].

Q: Hepatic venoocclusive disease (sinusoidal obstruction syndrome) is characterized by which of the following?

Hepatomegaly. ***Hepatomegaly*** - **Hepatic veno-occlusive disease (HVOD)**, also known as **sinusoidal obstruction syndrome (SOS)**, involves obstruction of the **hepatic sinusoids** and small hepatic venules [2]. - This obstruction leads to **congestion** within the liver, causing the liver to swell and become enlarged, which is termed **hepatomegaly**. *Central venous congestion* - While there is **congestion within the liver**, the primary pathology in HVOD is at the level of the **sinusoids and small hepatic venules**, not necessarily directly involving **central venous congestion** originating from the heart [2]. - Central venous congestion is more characteristic of conditions like **right-sided heart failure** [2]. *Portal vein obstruction* - **Portal vein obstruction** involves blockage of the main **portal vein**, which supplies blood to the liver, leading to **portal hypertension** and symptoms like varices and ascites [1], [3]. - In contrast, HVOD/SOS is characterized by obstruction of the **intrahepatic sinusoids and venules**, primarily impeding blood outflow from the liver [2]. *Budd-Chiari syndrome* - **Budd-Chiari syndrome** involves obstruction of the **hepatic veins** (larger veins draining the liver) or the **inferior vena cava**. - Although it also causes liver congestion and often hepatomegaly, the **level of obstruction is different** from HVOD/SOS, which affects the smaller **intrasinusoidal venules** [2].

Q: Which of the following vitamin deficiencies is seen in short bowel syndrome?

Vitamin B 12. ### Vitamin B 12 - **Short bowel syndrome (SBS)** often leads to **malabsorption** of vitamin B12, particularly if the **terminal ileum**—the primary site of B12 absorption—is affected or resected [2]. - **Vitamin B12 deficiency** can result in **megaloblastic anemia** and neurological complications [1]. *Vitamin K* - While **fat-soluble vitamins** can be malabsorbed in SBS due to **fat malabsorption**, **vitamin K deficiency** is less common than B12 deficiency unless there is significant **cholestasis** or extensive small bowel resection affecting bile salt absorption [3]. - **Vitamin K** is also synthesized by **gut bacteria**, which might partially compensate for dietary malabsorption in some cases. *Vitamin A* - **Vitamin A** is a **fat-soluble vitamin** that can be malabsorbed in SBS, especially in patients with significant **fat malabsorption** [3]. - However, **vitamin B12 deficiency** is a more universal and severe concern in many SBS patients and directly relates to the specific absorption site in the **terminal ileum** [2]. *Vitamin D* - **Vitamin D** is also a **fat-soluble vitamin**, and its malabsorption is common in SBS due to **steatorrhea** and reduced absorption surface [3]. - While important, the question asks for "the" most likely deficiency, and **vitamin B12** is particularly vulnerable due to its specific intestinal absorption site being frequently affected in SBS [2].

Q: Which of the following tumor markers is most specific for hepatocellular carcinoma (HCC)?

PIVKA-2. ***PIVKA-2*** - **PIVKA-2 (protein induced by vitamin K absence or antagonist-II)** is a tumor marker that is highly specific for **hepatocellular carcinoma (HCC)**, especially in differentiating it from other liver diseases. - Its levels can distinguish HCC from **cirrhosis** and **chronic hepatitis**, particularly when AFP levels are normal. - *Neurotensin* - **Neurotensin** is a neuropeptide that can be elevated in certain neuroendocrine tumors, such as **carcinoid tumors** or **pheochromocytomas**. - It is **not specific** for hepatocellular carcinoma and is not routinely used in its diagnosis. - *Alpha-fetoprotein (AFP)* - While **alpha-fetoprotein (AFP)** is a commonly used tumor marker for **HCC**, its specificity is limited as it can also be elevated in other conditions like **cirrhosis**, **chronic hepatitis**, and **germ cell tumors** [2]. - High AFP levels can also be seen in **pregnant women**, making it less specific than PIVKA-2 for HCC. - In HCC patients with elevated AFP levels, serial measurements can be a useful biomarker of disease progression/response to treatment [1]. - *CA 19-9* - **CA 19-9** is a tumor marker primarily associated with **pancreatic cancer** and can also be elevated in **biliary tract cancers**. - It is **not specific** for hepatocellular carcinoma and is not used in its primary diagnosis or monitoring.

Q: Which of the following statements about Boerhaave's syndrome is true?

Presented with acute chest pain. ***Presented with acute chest pain*** - **Boerhaave's syndrome**, a spontaneous esophageal rupture, classically presents with sudden, severe **retrosternal chest pain** that can radiate to the back or left shoulder, often accompanied by **vomiting** or retching. - The pain is typically excruciating and can be mistaken for a myocardial infarction or aortic dissection. *Not typically iatrogenic* - Boerhaave's syndrome is defined as **spontaneous esophageal rupture**, distinguishing it from iatrogenic perforations (e.g., during endoscopy). - While it occurs spontaneously, it is usually precipitated by events causing a sudden increase in intra-abdominal pressure, such as forceful vomiting or straining. *Usually asymptomatic* - Boerhaave's syndrome is a **medical emergency** characterized by severe symptoms, making it highly unlikely to be asymptomatic. - The extravasation of gastric contents into the mediastinum and pleural spaces causes immense pain and rapid deterioration, leading to sepsis if not treated promptly. *Requires surgical intervention for large perforations* - While large perforations often necessitate **surgical repair**, the statement is not definitively "true" as the primary characteristic of the syndrome. - The management of Boerhaave's syndrome depends on the size of the perforation, time since rupture, and patient stability, ranging from conservative management for small, contained ruptures to surgical repair for larger tears.

Question 1

A 45-year-old man is complaining of vomiting, with vomitus consisting of food mass taken a few days back, foul-smelling breath, and occasional dysphagia to solid food. What is the diagnosis?

Accepted Answer

Zenker's diverticulum

Answer

Scleroderma

Answer

Achalasia cardia

Answer

Diabetic gastroparesis

Question 2

Which specific condition is a significant risk factor associated with cholangiocarcinoma?

Accepted Answer

Primary sclerosing cholangitis

Answer

Obesity

Answer

Salmonella carrier state

Answer

HBV infection

Question 3

Which of the following variables is least predictive of 6-week mortality?

Accepted Answer

Age > 50

Answer

MELD score > 18

Answer

Child-Pugh class C

Answer

Early rebleeding

Question 4

Increased gastrin is seen in what conditions?

Accepted Answer

Zollinger-Ellison syndrome

Answer

Iron deficiency anaemia

Answer

Duodenal ulcer

Answer

Gastric cancer

Question 5

What is the treatment of choice in duodenal ulcer without any complications of hemorrhage?

Accepted Answer

Proton pump inhibitors

Answer

Highly selective vagotomy

Answer

Trunkal vagotomy

Answer

None of the options

Question 6

What is the leading cause of death in patients with Crohn's disease?

Accepted Answer

Thromboembolic complication

Answer

Sepsis

Answer

Malignancy

Answer

Electrolyte disturbance

Question 7

Hepatic venoocclusive disease (sinusoidal obstruction syndrome) is characterized by which of the following?

Accepted Answer

Hepatomegaly

Answer

Central venous congestion

Answer

Budd chiari syndrome

Answer

Portal vein obstruction

Question 8

Which of the following vitamin deficiencies is seen in short bowel syndrome?

Accepted Answer

Vitamin B 12

Answer

Vitamin K

Answer

Vitamin A

Answer

Vitamin D

Question 9

Which of the following tumor markers is most specific for hepatocellular carcinoma (HCC)?

Accepted Answer

PIVKA-2

Answer

Alpha-fetoprotein (AFP)

Answer

CA 19-9

Answer

Neurotensin

Question 10

Which of the following statements about Boerhaave's syndrome is true?

Accepted Answer

Presented with acute chest pain

Answer

Not typically iatrogenic

Answer

Usually asymptomatic

Answer

Requires surgical intervention for large perforations

Gastroenterology — MCQs

Gastroenterology — MCQs

On this page

Practice by Chapter

Want unlimited practice?