Gastroenterology Practice Questions

Q: Which of the following is considered an extra-intestinal manifestation of inflammatory bowel disease?

Osteoarthritis. The correct answer is **C. Osteoarthritis**. In the context of Inflammatory Bowel Disease (IBD), joint involvement is the most common extra-intestinal manifestation (EIM). However, the specific types of joint disease associated with IBD are **inflammatory** in nature, such as **Peripheral Arthritis** (Type I and Type II) and **Ankylosing Spondylitis** [1]. **Osteoarthritis** is a degenerative joint disease characterized by "wear and tear" of cartilage; it is not an immune-mediated manifestation of IBD. **Analysis of Options:** * **A. Uveitis:** A common ocular EIM of IBD (more frequent in Crohn’s) [2]. It presents with eye pain, photophobia, and blurred vision and requires urgent treatment to prevent blindness. * **B. Sclerosing Cholangitis:** Specifically **Primary Sclerosing Cholangitis (PSC)** is a classic hepatobiliary EIM, strongly associated with Ulcerative Colitis (UC). It is characterized by fibrotic strictures of the bile ducts. * **D. Skin Nodules:** These refer to **Erythema Nodosum**, the most common skin manifestation of IBD. They are painful, red nodules typically found on the pretibial surface (shins) and often correlate with bowel disease activity. **NEET-PG High-Yield Pearls:** 1. **Activity Correlation:** Erythema Nodosum and Type I Peripheral Arthritis (pauciarticular) usually parallel the activity of the intestinal inflammation [1]. 2. **Independence from Activity:** Ankylosing Spondylitis, Sacroiliitis, and Primary Sclerosing Cholangitis follow a course **independent** of the bowel disease activity [1]. 3. **HLA Association:** HLA-B27 is strongly linked to axial involvement (Ankylosing Spondylitis) in IBD patients [2]. 4. **Pyoderma Gangrenosum:** A more severe, necrotic skin ulceration associated with IBD (mostly UC) that does not always correlate with bowel activity.

Q: A patient is said to have chronic diarrhea if it is occurring for more than how many weeks?

4. **Explanation:** Diarrhea is clinically classified based on the duration of symptoms to help narrow down the differential diagnosis and guide management. * **The Correct Answer (B):** According to standard medical textbooks (Harrison’s Principles of Internal Medicine) and clinical guidelines, **chronic diarrhea** is defined as a decrease in stool consistency or an increase in frequency (typically >3 stools/day) lasting for **more than 4 weeks**. This duration is significant because most infectious causes (viral or bacterial) resolve within 2 to 4 weeks. Symptoms persisting beyond this point often indicate non-infectious etiologies like Malabsorption syndromes, Inflammatory Bowel Disease (IBD), or Irritable Bowel Syndrome (IBS). **Analysis of Incorrect Options:** * **Option A (3 weeks):** While some older texts used 3 weeks as a threshold, modern consensus (including the AGA and Harrison's) strictly defines chronic as >4 weeks. * **Options C & D (5 and 6 weeks):** These durations are unnecessarily long for the definition. By the 4-week mark, the condition is already classified as chronic, and diagnostic workups for underlying pathology should begin. **NEET-PG High-Yield Pearls:** 1. **Acute Diarrhea:** Lasts 4 weeks. 4. **Pseudodiarrhea:** Frequent passage of small volumes of stool (often associated with rectal urgency or IBS), not to be confused with true diarrhea which involves increased stool weight (>200g/day). 5. **Factitious Diarrhea:** A form of Munchausen syndrome where patients self-administer laxatives; it should be suspected in unexplained chronic diarrhea.

Q: Pigment gallstones are usually not seen in which of the following conditions?

Clofibrate therapy. The formation of gallstones depends on the composition of bile. Gallstones are broadly classified into **Cholesterol stones** and **Pigment stones** (Black or Brown) [1]. **Why Clofibrate therapy is the correct answer:** Clofibrate (and other fibrates) increases the risk of **cholesterol gallstones**, not pigment stones. Fibrates inhibit the enzyme *cholesterol 7α-hydroxylase*, which reduces bile acid synthesis. Simultaneously, they increase the activity of *HMG-CoA reductase*, leading to increased biliary cholesterol excretion. This results in supersaturation of bile with cholesterol, promoting the formation of cholesterol stones. **Analysis of Incorrect Options:** * **Gilbert’s Syndrome:** This condition involves a deficiency in glucuronosyltransferase, leading to increased levels of unconjugated bilirubin. Chronic hyperbilirubinemia promotes the precipitation of calcium bilirubinate, leading to **black pigment stones**. * **Alcoholic Cirrhosis:** Cirrhosis is a major risk factor for **pigment stones**. The mechanism involves hypersplenism (leading to hemolysis), decreased hepatic synthesis of bile salts, and impaired gallbladder motility. * **Cystic Fibrosis:** Patients with CF often develop **pigment stones** due to bile acid malabsorption in the terminal ileum and increased biliary calcium concentrations. **NEET-PG High-Yield Pearls:** * **Black Pigment Stones:** Associated with chronic hemolysis (e.g., Thalassemia, Hereditary Spherocytosis), Cirrhosis, and Gilbert’s syndrome. They are usually found in the gallbladder. * **Brown Pigment Stones:** Associated with biliary stasis and **infections** (e.g., *E. coli*, *Clonorchis sinensis*) [2]. They often form *de novo* in the bile ducts [2]. * **Risk Factors for Cholesterol Stones (The 4 F's):** Fat, Female, Fertile, Forty. * **Ileal Resection/Disease:** Leads to bile salt malabsorption, predisposing to cholesterol stones.

Q: A 60-year-old patient presents with bright red blood per rectum. The bleeding started abruptly several hours prior to visit. The patient reports lightheadedness when standing up rapidly but denies abdominal pain, cramping, fever, nausea, or vomiting. He has no history of previous bleeding or abdominal pain but has a history of coronary artery disease and takes aspirin. He is afebrile, slightly hypotensive and tachycardic, but hemodynamically stable. Examination reveals decreased skin turgor and dry mucous membranes. There is no abdominal tenderness. Rectal examination is positive for gross blood. What is the most likely diagnosis?

Arteriovenous malformation. ### Explanation The patient presents with **painless, acute, brisk hematochezia** (bright red blood per rectum) and signs of hypovolemia (orthostatic lightheadedness, tachycardia, dry mucous membranes) without abdominal pain. In an elderly patient, the two most common causes of such a presentation are **Diverticulosis** and **Arteriovenous Malformations (AVMs)/Angiodysplasia**. **Why Arteriovenous Malformation is correct:** AVMs are dilated, tortuous submucosal vessels most commonly found in the cecum and right colon of patients over 60 [1]. They typically cause **painless bleeding** that can range from occult to massive hematochezia [1]. The absence of abdominal pain and the patient's age strongly point toward a vascular cause. **Why the other options are incorrect:** * **Diverticulitis:** While diverticulosis causes painless bleeding, diverticulitis involves inflammation/infection and presents with **left lower quadrant pain**, fever, and altered bowel habits; it rarely causes significant bleeding. * **Infectious Colitis:** This typically presents with **fever, abdominal cramps, and diarrhea** (often mucoid or bloody), which are absent here. * **Ischemic Colitis:** This usually presents with the sudden onset of **crampy abdominal pain** followed by bloody diarrhea, often occurring at "watershed" areas (splenic flexure) during episodes of hypotension [2]. The lack of pain makes this unlikely. **Clinical Pearls for NEET-PG:** * **Most common cause of brisk LGIB in elderly:** Diverticulosis (painless). * **Second most common cause:** Angiodysplasia/AVM (painless). * **Heyde’s Syndrome:** The triad of Aortic Stenosis, GI bleeding from angiodysplasia, and acquired von Willebrand deficiency. * **Initial Management:** Hemodynamic stabilization with IV fluids is always the first step before diagnostic colonoscopy.

Q: What is the most common complication of acute pancreatitis?

Hypoxemia. **Explanation:** In the context of acute pancreatitis, complications are categorized into systemic and local. **Hypoxemia** is the most common systemic complication, occurring in approximately 30-50% of patients, often within the first 24-48 hours. **Why Hypoxemia is the Correct Answer:** The underlying mechanism involves the systemic release of pancreatic enzymes (like phospholipase A2) and inflammatory cytokines. These mediators damage the alveolar-capillary membrane and degrade pulmonary surfactant, leading to ventilation-perfusion mismatch, atelectasis, and pleural effusion. This spectrum of lung injury ranges from mild hypoxemia to full-blown **Acute Respiratory Distress Syndrome (ARDS)**, which is also the leading cause of death in the early phase of the disease. **Analysis of Incorrect Options:** * **A. Chronic pancreatitis:** This is a separate disease process characterized by permanent structural damage. While recurrent acute attacks can lead to chronic pancreatitis (the "necrosis-fibrosis" sequence), it is not a common immediate complication of a single acute episode. * **B. Abscess:** Pancreatic abscess (infected walled-off necrosis) is a late local complication, usually occurring 4-6 weeks after the onset. It is less frequent than systemic respiratory issues. * **C. Pseudocyst of pancreas:** This is the **most common local complication** of acute pancreatitis. However, since the question asks for the most common complication overall, systemic hypoxemia takes precedence due to its higher incidence in the early phase. **NEET-PG High-Yield Pearls:** * **Most common systemic complication:** Hypoxemia/Pulmonary complications. * **Most common local complication:** Pseudocyst (requires 4 weeks to form). * **Most common cause of early death ( 1 week):** Pancreatic infection/Sepsis.

Q: According to Child-Pugh criteria, what does the presence of hepatic encephalopathy, a bilirubin level of 2.5 mg/dL, an albumin level of 3 gm/dL, and controlled ascites indicate?

Grade B. The **Child-Pugh Score** (or Child-Turcotte-Pugh) is a vital clinical tool used to assess the prognosis of chronic liver disease and cirrhosis. It evaluates five parameters: Bilirubin, Albumin, PT/INR, Ascites, and Encephalopathy [1]. ### **Step-by-Step Scoring for the Question:** 1. **Encephalopathy:** Presence (Grade 1-2) = **2 points**. 2. **Bilirubin (2.5 mg/dL):** Range 2–3 mg/dL = **2 points**. 3. **Albumin (3.0 gm/dL):** Range 2.8–3.5 gm/dL = **2 points**. 4. **Ascites:** Controlled (Slight/Mild) = **2 points**. 5. **PT/INR:** Not provided, but assuming a baseline of 1 point (normal). **Total Score:** 2 + 2 + 2 + 2 + 1 = **9 points**. ### **Classification:** * **Grade A (5–6 points):** Well-compensated disease. * **Grade B (7–9 points):** Significant functional impairment. **(Correct Answer)** * **Grade C (10–15 points):** Decompensated disease. ### **Why Other Options are Wrong:** * **Option A (Grade A):** Requires a score of 5–6. The patient already exceeds this due to the presence of encephalopathy and elevated bilirubin. * **Option B (Grade C):** Requires a score of 10 or more. This patient’s parameters are moderately deranged but not yet at the severe threshold. * **Option D:** While INR is missing, the four provided parameters already sum to 8 points, placing the patient firmly in Grade B regardless of whether the INR is 1 or 2 points. ### **High-Yield NEET-PG Pearls:** * **Mnemonic for Parameters:** **"ABCDE"** (**A**lbumin, **B**ilirubin, **C**oagulation [INR], **D**istension [Ascites], **E**ncephalopathy). * **Surgical Significance:** Grade A patients are generally safe for major surgery; Grade B requires caution; Grade C is a contraindication for non-transplant surgery. * **Bilirubin Exception:** In Primary Biliary Cholangitis (PBC), the bilirubin cut-offs are higher (1–4 mg/dL for 2 points; >10 mg/dL for 3 points).

Question 1

In the setting of cirrhosis and ascites, Spontaneous Bacterial Peritonitis (SBP) is best treated with cefotaxime injection. What is the next best oral alternative drug for its treatment?

Accepted Answer

Ofloxacin

Answer

Norfloxacin

Answer

Ciprofloxacin

Answer

Pefloxacin

Question 2

Which of the following is considered an extra-intestinal manifestation of inflammatory bowel disease?

Accepted Answer

Osteoarthritis

Answer

Uveitis

Answer

Sclerosing cholangitis

Answer

Skin nodules

Question 3

Diarrhoea with ulcer responding to PPI is seen in which of the following conditions?

Accepted Answer

Zollinger Ellison syndrome

Answer

MEN 1 syndrome

Answer

H. pylori infection

Answer

VIPoma

Question 4

Which of the following is NOT a cause of secretory diarrhea?

Accepted Answer

Lactose intolerance

Answer

Vibrio cholera

Answer

Inflammatory bowel disease

Answer

Gastrinoma

Question 5

A patient is said to have chronic diarrhea if it is occurring for more than how many weeks?

Accepted Answer

4

Answer

3

Answer

5

Answer

6

Question 6

Pigment gallstones are usually not seen in which of the following conditions?

Accepted Answer

Clofibrate therapy

Answer

Gilbert's syndrome

Answer

Alcoholic cirrhosis

Answer

Cystic fibrosis

Question 7

A 60-year-old patient presents with bright red blood per rectum. The bleeding started abruptly several hours prior to visit. The patient reports lightheadedness when standing up rapidly but denies abdominal pain, cramping, fever, nausea, or vomiting. He has no history of previous bleeding or abdominal pain but has a history of coronary artery disease and takes aspirin. He is afebrile, slightly hypotensive and tachycardic, but hemodynamically stable. Examination reveals decreased skin turgor and dry mucous membranes. There is no abdominal tenderness. Rectal examination is positive for gross blood. What is the most likely diagnosis?

Accepted Answer

Arteriovenous malformation

Answer

Diverticulitis

Answer

Infectious colitis

Answer

Ischemic colitis

Question 8

What is the most common complication of acute pancreatitis?

Accepted Answer

Hypoxemia

Answer

Chronic pancreatitis

Answer

Abscess

Answer

Pseudocyst of pancreas

Question 9

According to Child-Pugh criteria, what does the presence of hepatic encephalopathy, a bilirubin level of 2.5 mg/dL, an albumin level of 3 gm/dL, and controlled ascites indicate?

Accepted Answer

Grade B

Answer

Grade A

Answer

Grade C

Answer

More information needed

Question 10

A 55-year-old male patient presenting with gastritis symptoms was diagnosed with a gastric ulcer three years ago and underwent partial gastrectomy. He is currently on high-dose omeprazole. A follow-up endoscopy reveals two ulcerative lesions in the gastric mucosa. What is the next step in management?

Accepted Answer

Gastrin level

Answer

H. pylori serology

Answer

Insulin tolerance test

Answer

CT scan

Gastroenterology — MCQs

Gastroenterology — MCQs

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