Peptic Ulcer Disease — MCQs
What is the treatment of choice in duodenal ulcer without any complications of hemorrhage?
In a patient with a perforated peptic ulcer, what surgical procedure is typically indicated?
What is the commonest site of peptic ulcer?
An adult male presents with chronic atrophic gastritis. Growth on Skirrow's medium and a positive rapid urease test were observed. What is the most likely diagnosis?
What is the primary mechanism by which Helicobacter pylori leads to peptic ulcer disease?
The causative agent for duodenal ulcer is:
Which one of the following statements is not correct regarding Gastric outlet obstruction associated with long standing peptic ulcer disease?
A patient presents with hematemesis and is diagnosed with esophageal varices. What is the first line of treatment?
A 54-year-old man presents to the clinic for epigastric discomfort during the previous month. He states he has not vomited, but reports of having epigastric pain that worsens after most meals. The patient states that his stool “looks black sometimes.” The patient does not report of any weight loss. He has a past medical history of gastroesophageal reflux disease, diabetes mellitus, peptic ulcer disease, and Crohn’s disease. The patient takes over-the-counter ranitidine, and holds prescriptions for metformin and infliximab. The blood pressure is 132/84 mm Hg, the heart rate is 64/min, the respiratory rate is 14/min, and the temperature is 37.3°C (99.1°F). On physical examination, the abdomen is tender to palpation in the epigastric region. Which of the following is the most appropriate next step to accurately determine the diagnosis of this patient?
Massive bleeding per rectum in an elderly patient is due to.
Peptic Ulcer Disease Indian Medical PG Practice Questions and MCQs
Question 1: What is the treatment of choice in duodenal ulcer without any complications of hemorrhage?
- A. Highly selective vagotomy
- B. Trunkal vagotomy
- C. Proton pump inhibitors (Correct Answer)
- D. None of the options
Explanation: ***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].
Question 2: In a patient with a perforated peptic ulcer, what surgical procedure is typically indicated?
- A. Total gastrectomy
- B. Laparoscopic repair of the perforation (Correct Answer)
- C. Gastric bypass
- D. Pyloroplasty
Explanation: ***Laparoscopic repair of the perforation*** - For a **perforated peptic ulcer**, the immediate goal is to close the perforation and control contamination, which is typically achieved via **laparoscopic primary repair** using sutures and an omental patch (Graham patch). - This minimally invasive approach has advantages of reduced pain, shorter hospital stay, and faster recovery compared to open surgery, making it suitable for most stable patients. *Total gastrectomy* - **Total gastrectomy** involves the complete removal of the stomach and is a major, highly invasive procedure. - It is typically reserved for extensive gastric malignancies or diffuse, intractable ulcer disease, not for an acute, localized perforation. *Gastric bypass* - **Gastric bypass** surgery is primarily a **bariatric procedure** performed for severe obesity or severe, uncontrolled diabetes. - It is not indicated for the emergency management of a perforated peptic ulcer. *Pyloroplasty* - **Pyloroplasty** is a procedure to widen the pyloric channel and is performed to improve gastric emptying. - It is typically done in conjunction with a vagotomy for recurrent, complicated duodenal ulcers that cause obstruction, not as the primary treatment for an acute perforation.
Question 3: What is the commonest site of peptic ulcer?
- A. Second part of the duodenum
- B. Distal third of the stomach
- C. Pylorus of the stomach
- D. First part of the duodenum (Correct Answer)
Explanation: ***First part of the duodenum*** - The **duodenal bulb** (first part of the duodenum) is the most common location for peptic ulcers due to its proximity to the pylorus, where it's exposed to **acidic chyme** and susceptible to **H. pylori infection**. - The **mucosal defenses** in the duodenum are often less robust compared to the stomach, making it more vulnerable to acid-pepsin aggression. *Second part of the duodenum* - Ulcers in the **second part of the duodenum** are relatively rare compared to the first part. - This section receives bile and pancreatic secretions which help to **neutralize stomach acid**, providing greater protection. *Distal third of the stomach* - Ulcers in the **distal third of the stomach** are less common than in the first part of the duodenum. - While **gastric ulcers** do occur, they are more frequently found in the **antrum or lesser curvature** of the stomach. *Pylorus of the stomach* - Ulcers can occur in the **pylorus**, but they are not as frequent as those in the **duodenal bulb**. - Pyloric ulcers are considered a type of **gastric ulcer** and can be associated with gastric outlet obstruction.
Question 4: An adult male presents with chronic atrophic gastritis. Growth on Skirrow's medium and a positive rapid urease test were observed. What is the most likely diagnosis?
- A. H. pylori (Correct Answer)
- B. V. cholerae
- C. H. influenzae
- D. K. pneumoniae
Explanation: ***H pylori*** - The combination of **chronic atrophic gastritis**, growth on **Skirrow's medium**, and a **positive rapid urease test** is highly characteristic of *Helicobacter pylori* infection. - *H. pylori* is a known cause of **gastritis**, peptic ulcers, and is the only bacterium that produces large amounts of **urease**, which is detected by the rapid urease test. *H. influenzae* - This bacterium is primarily associated with **respiratory tract infections**, meningitis, and otitis media, not gastric conditions. - It does not typically grow on Skirrow's medium and is not known to produce significant urease for a positive rapid urease test. *K. pneumoniae* - *Klebsiella pneumoniae* is a common cause of **pneumonia**, urinary tract infections, and sepsis, with no direct involvement in chronic atrophic gastritis or urease production in the stomach. - It does not typically grow on selective media like Skirrow's, which is designed for microaerophilic organisms. *V. cholerae* - *Vibrio cholerae* is the causative agent of **cholera**, characterized by severe watery diarrhea, and is not associated with gastric inflammation or positive urease tests in this context. - It grows on specific media like TCBS agar and does not cause chronic atrophic gastritis.
Question 5: What is the primary mechanism by which Helicobacter pylori leads to peptic ulcer disease?
- A. Increased gastric acid secretion due to H. pylori infection.
- B. Increased production of gastric mucus.
- C. Increased gastric motility due to H. pylori.
- D. Decreased gastric mucosal protection due to H. pylori infection. (Correct Answer)
Explanation: ***Decreased gastric mucosal protection due to H. pylori infection.*** [1] - *Helicobacter pylori* primarily causes peptic ulcer disease by **damaging the protective mucosal layer** of the stomach and duodenum. - This bacterium produces enzymes like **urease**, which neutralizes gastric acid locally, allowing it to colonize the mucus layer and subsequently weaken its integrity, making the underlying cells vulnerable to acid. *Increased gastric acid secretion due to H. pylori infection.* - While *H. pylori* can indirectly affect gastric acid secretion (e.g., by altering gastrin and somatostatin release), its primary and most direct mechanism for ulcer formation is **mucosal damage**, not solely increased acid. [1] - Some strains directly influence **parietal cell function**, but this is a secondary effect compared to the direct mucosal assault. [1] *Increased production of gastric mucus.* - *H. pylori* infection typically leads to a **reduction** or alteration in gastric mucus production and quality, not an increase. - The bacterium thrives by **penetrating the mucus layer**, indicating that it benefits from a compromised barrier rather than an enhanced one. *Increased gastric motility due to H. pylori.* - There is no direct evidence that *H. pylori* significantly increases **gastric motility** as a primary mechanism for peptic ulcer development. - Motility disorders are not considered a hallmark of *H. pylori*-induced ulcerogenesis.
Question 6: The causative agent for duodenal ulcer is:
- A. Lactobacilli
- B. E. coli
- C. H. Pylori (Correct Answer)
- D. Shigella
Explanation: ***H. pylori*** - ***H. pylori*** is a **Gram-negative spiral-shaped bacterium** that colonizes the stomach and duodenum, causing inflammation and increasing the risk of peptic ulcers, including duodenal ulcers. - It produces **urease**, which neutralizes stomach acid by converting urea to ammonia, protecting the bacteria and contributing to mucosal damage. *Lactobacilli* - **Lactobacilli** are **Gram-positive, rod-shaped bacteria** commonly found in the digestive tract and fermented foods. - They are generally considered **beneficial probiotics** and do not cause duodenal ulcers. *E. coli* - ***E. coli*** is a **Gram-negative, rod-shaped bacterium** typically found in the intestines of humans and animals. - While some strains can cause **gastrointestinal infections** (e.g., traveler's diarrhea), *E. coli* is not a known cause of duodenal ulcers. *Shigella* - **Shigella** is a **Gram-negative, rod-shaped bacterium** that causes **shigellosis**, an intestinal infection characterized by severe diarrhea (dysentery). - It primarily affects the **large intestine** and does not cause duodenal ulcers.
Question 7: Which one of the following statements is not correct regarding Gastric outlet obstruction associated with long standing peptic ulcer disease?
- A. Medical therapy has no role in the treatment of this condition. (Correct Answer)
- B. Endoscopic biopsy is essential to exclude malignancy.
- C. Hypochloraemic alkalosis is the usual metabolic abnormality in such cases.
- D. Operation is frequently required along with a drainage procedure.
Explanation: ***Medical therapy has no role in the treatment of this condition.*** - This statement is incorrect because **medical management**, including **proton pump inhibitors (PPIs)**, can be effective in reducing inflammation and ulcer healing, which may alleviate symptoms of **gastric outlet obstruction (GOO)**, especially in cases where the obstruction is due to an active ulcer and associated edema. - While surgery is often required for persistent or severe obstruction, initial medical therapy can be attempted to confirm the reversibility of the obstruction or to optimize the patient's condition before surgical intervention. *Endoscopic biopsy is essential to exclude malignancy.* [1] - **Endoscopic biopsy** is crucial because **malignancy** (e.g., gastric adenocarcinoma) can present with symptoms similar to peptic ulcer disease and lead to **gastric outlet obstruction**. - Distinguishing between benign and malignant causes is critical for appropriate management, as the treatment strategies differ significantly. [1] *Hypochloraemic alkalosis is the usual metabolic abnormality in such cases.* [1] - **Hypochloremic alkalosis** occurs due to the repeated **vomiting of gastric contents**, which are rich in hydrochloric acid. [1] - This loss of acid and chloride, along with fluid depletion, leads to increased bicarbonate retention by the kidneys and can cause a metabolic alkalosis with low chloride levels. *Operation is frequently required along with a drainage procedure.* [1] - When medical therapy fails or the obstruction is severe due to **scarring and fibrosis** from chronic peptic ulcer disease, surgical intervention is often necessary. - A drainage procedure, such as **gastrojejunostomy**, is performed to bypass the obstructed pylorus and restore gastric emptying.
Question 8: A patient presents with hematemesis and is diagnosed with esophageal varices. What is the first line of treatment?
- A. Surgery
- B. Steroid therapy
- C. Endoscopic banding (Correct Answer)
- D. Proton pump inhibitors
Explanation: ***Endoscopic banding*** - **Endoscopic variceal ligation (EVL)**, or banding, is the **first-line treatment** for acute variceal bleeding [1]. - It involves placing elastic bands over the varices to **occlude blood flow** and prevent further hemorrhage [1]. *Surgery* - **Surgical shunting procedures** or **liver transplantation** are generally reserved for patients who fail endoscopic and pharmacologic therapies [1]. - These are **invasive options** with significant risks and are not considered first-line for acute bleeding. *Steroid therapy* - **Steroids** are typically used as **anti-inflammatory agents** and are not indicated for controlling bleeding from esophageal varices. - Their use would have **no direct impact** on stopping the hemorrhage. *Proton pump inhibitors* - **Proton pump inhibitors (PPIs)** are used to **reduce gastric acid production**, which is beneficial in conditions like peptic ulcer disease or reflux esophagitis [2]. - They are **not effective** in treating or preventing bleeding from esophageal varices, as the bleeding source is venous [2].
Question 9: A 54-year-old man presents to the clinic for epigastric discomfort during the previous month. He states he has not vomited, but reports of having epigastric pain that worsens after most meals. The patient states that his stool “looks black sometimes.” The patient does not report of any weight loss. He has a past medical history of gastroesophageal reflux disease, diabetes mellitus, peptic ulcer disease, and Crohn’s disease. The patient takes over-the-counter ranitidine, and holds prescriptions for metformin and infliximab. The blood pressure is 132/84 mm Hg, the heart rate is 64/min, the respiratory rate is 14/min, and the temperature is 37.3°C (99.1°F). On physical examination, the abdomen is tender to palpation in the epigastric region. Which of the following is the most appropriate next step to accurately determine the diagnosis of this patient?
- A. Treat with PPI, clarithromycin, and amoxicillin before doing lab and imaging tests
- B. Urea breath testing
- C. Serology for Helicobacter pylori
- D. CT abdomen
- E. Endoscopy with biopsy (Correct Answer)
Explanation: ***Endoscopy with biopsy*** - Given the patient's age (>50 years), new-onset epigastric pain, history of **peptic ulcer disease**, and "black sometimes" stools suggesting **melena** or **upper gastrointestinal bleeding**, an endoscopy with biopsy is crucial [1]. - This procedure allows direct visualization of the esophageal, gastric, and duodenal mucosa, enabling identification of ulcers, erosions, or masses, and tissue collection for **histopathological examination** (e.g., for *H. pylori* infection, malignancy, or Crohn's disease involvement) [1]. *Treat with PPI, clarithromycin, and amoxicillin before doing lab and imaging tests* - This approach, known as **"triple therapy,"** is a treatment for **H. pylori infection**, but it should not be initiated without a confirmed diagnosis in this patient presenting with alarm symptoms [2]. - Doing so without a prior diagnosis could mask underlying pathology, such as **malignancy**, and delay appropriate treatment. *Urea breath testing* - **Urea breath testing** is a non-invasive method to detect active *H. pylori* infection [2]. - While useful, it does not allow for direct visualization of the mucosa or biopsy collection, which is essential given the patient's **alarm features** like age and potential bleeding [2]. *Serology for Helicobacter pylori* - **H. pylori serology** detects antibodies to *H. pylori*, indicating past or present infection [2]. - It cannot differentiate between active and past infection and, importantly, does not provide information about the **mucosal integrity** or allow for biopsy of suspicious lesions [2]. *CT abdomen* - A **CT scan of the abdomen** can visualize abdominal organs and detect masses or significant inflammation. - However, it is not the primary diagnostic tool for evaluating the **upper gastrointestinal mucosa** and cannot directly identify ulcers, erosions, or provide tissue for biopsy in the same way an endoscopy can.
Question 10: Massive bleeding per rectum in an elderly patient is due to.
- A. Colitis
- B. Diverticulosis (Correct Answer)
- C. Peptic ulcer disease
- D. Colorectal cancer
Explanation: ***Diverticulosis*** - **Diverticular bleeding** is the most common cause of **massive lower gastrointestinal bleeding** in elderly patients. - Bleeding occurs when a small artery at the base of a diverticulum is eroded, leading to significant, often **painless, rectal bleeding**. *Colitis* - While colitis can cause rectal bleeding, it is typically associated with **diarrhea, abdominal pain**, and often **bloody stools** rather than massive, isolated rectal bleeding. - Inflammatory conditions like ulcerative colitis can cause bleeding, but a single episode of massive hemorrhage is less characteristic. *Colorectal cancer* - **Colorectal cancer** can cause rectal bleeding, but it is typically **chronic, intermittent, and low-volume**, often presenting as blood mixed with stool or on the surface of the stool. - It rarely presents as a sudden, **massive hemorrhage** that fills the toilet bowl. *Peptic ulcer disease* - **Peptic ulcer disease** is a cause of **upper gastrointestinal bleeding**, presenting as **hematemesis** (vomiting blood) or **melena** (black, tarry stools) [1]. - It would not cause **massive bleeding per rectum** unless there is a very rapid transit of blood through the entire gastrointestinal tract, which is uncommon.
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