Gastroenterology Practice Questions

Q: A 60-year-old man with a known history of hemochromatosis, cirrhosis, and portal hypertension presented to the emergency department with altered mental status. The patient's attendant reported that over the last three days, the patient has become confused. There is no history of melena or hematemesis. For chronic ascites, diet control and spironolactone are being administered regularly. In the past, the patient experienced an episode of variceal bleeding for which he was prescribed propranolol, and no further episodes have occurred. On examination, the patient is not well-oriented to time and place but is oriented to person. He is afebrile, and his vital signs are stable; however, ascites and asterixis are notable. Laboratory investigations show a hemoglobin of 10.1 g/dL, creatinine of 1.4 mg/dL, and blood urea nitrogen of 45 mg/dL. Paracentesis revealed clear fluid with 800 WBC (40% neutrophils). Which statement regarding this condition is false?

Ascites is often preceded by infection.. The patient presents with cirrhosis, altered mental status (confusion), asterixis, and paracentesis showing an absolute neutrophil count (ANC) of 320 cells/mm³ (40% of 800). An ANC >250 cells/mm³ is diagnostic of **Spontaneous Bacterial Peritonitis (SBP)**. **1. Why Option A is the Correct (False) Statement:** The statement "Ascites is often preceded by infection" is incorrect because the pathophysiology is reversed. **Ascites precedes the infection.** SBP occurs when pre-existing ascitic fluid becomes infected, usually via transmigration of gut bacteria or hematogenous spread. Ascites itself is caused by portal hypertension and hypoalbuminemia, not by the infection [1]. **2. Analysis of Other Options:** * **Option B:** SBP can be clinically silent, but classic features include fever, abdominal pain/tenderness, and worsening hepatic encephalopathy (altered mental status) [2]. * **Option C:** Low ascitic fluid protein (** 250 cells/mm³ is the gold standard. * **Treatment:** Third-generation cephalosporins (e.g., **Cefotaxime**) are the drugs of choice. * **Albumin Therapy:** Administering IV albumin (1.5g/kg on day 1; 1g/kg on day 3) reduces the risk of hepatorenal syndrome and mortality. * **Prophylaxis:** Patients with ascitic protein <1.5 g/dL or a prior episode of SBP should receive long-term prophylaxis with Norfloxacin or Rifaximin.

Q: All of the following are true about amoebic liver abscess except?

Hepatocellular jaundice is a common presentation.. **Explanation:** Amoebic Liver Abscess (ALA), caused by *Entamoeba histolytica*, is the most common extra-intestinal manifestation of amoebiasis [1]. **Why Option D is the Correct Answer (False Statement):** While mild jaundice can occur in about 10-25% of cases due to large abscesses compressing the biliary tract or causing reactive inflammation, **frank hepatocellular jaundice is rare**. If jaundice is severe, it usually indicates a secondary bacterial infection or a massive abscess. Therefore, it is not considered a "common" or characteristic presentation of ALA. **Analysis of Other Options:** * **Option A (The pus is sterile):** The characteristic "anchovy sauce" pus is formed by liquefactive necrosis of hepatocytes [1]. It is typically **sterile** because the trophozoites are found in the abscess wall (periphery), not in the necrotic center [1]. * **Option B (Right lobe predilection):** Amoebae reach the liver via the portal circulation. The **right lobe** is more frequently involved (80% of cases) because it receives the bulk of the portal blood flow from the superior mesenteric vein (laminar flow theory). * **Option C (Intercostal tenderness):** This is a classic clinical sign. Point tenderness over the right lower intercostal spaces is highly suggestive of an underlying hepatic abscess. **NEET-PG High-Yield Pearls:** * **Most common site:** Superior-anterior aspect of the Right Lobe. * **Diagnosis:** Ultrasound is the initial investigation of choice; **Serology (ELISA)** for anti-amoebic antibodies is the most sensitive test. * **Treatment:** **Metronidazole** (Drug of choice) followed by a luminal amoebicide (e.g., Paromomycin or Diloxanide furoate) to eradicate the intestinal cyst carrier state. * **Aspiration:** Not routinely required unless the abscess is large (>10cm), at risk of rupture (left lobe), or fails to respond to medical therapy [2], [3].

Q: A 40-year-old male with a history of jaundice and ascites is a known alcoholic. Which of the following statements is true regarding his condition?

Decreased liver span. **Explanation:** The clinical presentation of jaundice, ascites, and a history of chronic alcohol abuse in a 40-year-old male strongly suggests **Alcoholic Liver Cirrhosis** [1]. **Why the correct answer is right:** In the late stages of cirrhosis, chronic inflammation and progressive fibrosis lead to the replacement of healthy parenchyma with regenerative nodules [1] and scar tissue. This process causes the liver to shrink and become firm/nodular. Therefore, a **decreased liver span** (typically 2** [1]. This occurs because alcohol induces mitochondrial AST and alcoholics are often deficient in pyridoxal-5-phosphate (Vitamin B6), which is required for ALT synthesis. * **B. Polymorphonuclear count > 5500/L:** While leukocytosis can occur in acute alcoholic hepatitis, a PMN count > 5500/L is not a standard diagnostic criterion for cirrhosis. However, in the context of ascites [2], a PMN count **> 250 cells/mm³** in ascitic fluid is diagnostic of Spontaneous Bacterial Peritonitis (SBP). * **C. Increased serum LDH:** LDH is a non-specific marker of cell turnover. While it may be elevated in ischemic hepatitis or malignancy, it is not a characteristic or diagnostic feature used to define alcoholic cirrhosis. **High-Yield Clinical Pearls for NEET-PG:** * **Maddrey’s Discriminant Function (DF):** Used to assess the severity of alcoholic hepatitis; a score > 32 indicates severe disease and warrants corticosteroid therapy. * **Zieve’s Syndrome:** A triad of hemolytic anemia, hyperlipidemia, and jaundice seen in alcoholic liver disease. * **First sign of Cirrhosis on Ultrasound:** Coarse echotexture and surface nodularity. * **Most common cause of death in Cirrhosis:** Variceal bleeding.

Q: Which of the following parameters is NOT included in the MELD score calculation?

Blood Urea. The **MELD (Model for End-Stage Liver Disease)** score is a validated scoring system used to predict the 3-month mortality in patients with chronic liver disease and to prioritize patients for liver transplantation [1]. ### **Explanation of the Correct Answer** **D. Blood Urea:** Blood Urea is not a component of the MELD score. While urea is a marker of renal function, it is significantly influenced by factors like protein intake, GI bleeding, and hydration status. Instead, the MELD score utilizes **Serum Creatinine** as a more stable and specific indicator of renal function, which is a critical prognostic factor in end-stage liver disease (e.g., Hepatorenal Syndrome) [1], [2]. ### **Analysis of Incorrect Options** The original MELD score (2002) is calculated using a logarithmic formula involving three key laboratory variables: * **A. INR (International Normalized Ratio):** Reflects the liver's synthetic function (clotting factors) [3]. * **B. Serum Bilirubin:** Reflects the liver’s excretory function and cholestasis [3]. * **C. Serum Creatinine:** Reflects renal function, which strongly correlates with survival in cirrhotic patients [1]. ### **High-Yield Clinical Pearls for NEET-PG** * **MELD-Na:** In 2016, **Serum Sodium** was added to the MELD score because hyponatremia is an independent predictor of mortality in cirrhosis. * **MELD 3.0:** The latest update (2023) now includes **Sex (Female)** and **Albumin** to address disparities in transplant access. * **PELD Score:** Used for children <12 years; it includes Albumin, Bilirubin, INR, Age (<1 year), and Growth Failure. * **Child-Pugh Score:** Unlike MELD (which is objective), the Child-Pugh score includes subjective parameters: **Ascites** and **Encephalopathy**, along with Bilirubin, Albumin, and INR [1].

Q: A 39-year-old female presents with chronic abdominal cramps, watery diarrhea, and periodic facial flushing. Examination reveals wheezing and a slightly enlarged liver. Workup reveals several masses within the liver and a large mass in the small intestine. Which of the following substances is likely to be elevated in her urine?

5-HIAA. The clinical presentation of chronic diarrhea, facial flushing, wheezing (bronchospasm), and a small intestinal mass with liver metastasis is classic for **Carcinoid Syndrome**. [1] **1. Why 5-HIAA is correct:** Carcinoid tumors are neuroendocrine tumors, most commonly arising from the enterochromaffin cells of the midgut (small intestine). [2] These cells secrete excessive amounts of **Serotonin (5-HT)**. Under normal conditions, serotonin is metabolized by the liver. However, when the tumor metastasizes to the liver, serotonin reaches the systemic circulation directly, bypassing hepatic metabolism. [1] Serotonin is eventually broken down by monoamine oxidase into **5-hydroxyindoleacetic acid (5-HIAA)**, which is excreted in the urine. A 24-hour urinary 5-HIAA test is the gold standard for diagnosis. **2. Why the other options are incorrect:** * **Aminolevulinic acid (ALA):** Elevated in Acute Intermittent Porphyria (AIP). While AIP presents with abdominal pain, it does not cause flushing, wheezing, or liver masses. * **FIGLU (Formiminoglutamic acid):** Elevated in **Folic acid deficiency**. It is a metabolic intermediate in histidine metabolism and is unrelated to neuroendocrine tumors. * **Norepinephrine:** Elevated in **Pheochromocytoma**. While this can cause flushing and hypertension, it does not typically cause chronic watery diarrhea or wheezing, and the primary mass would be in the adrenal gland. **Clinical Pearls for NEET-PG:** * **Triad of Carcinoid:** Flushing, Diarrhea, and Right-sided heart failure (Tricuspid regurgitation/Pulmonary stenosis). * **Pellagra Connection:** Excessive serotonin production consumes systemic **Tryptophan**, leading to Niacin (Vitamin B3) deficiency, potentially causing dermatitis, dementia, and diarrhea. * **Treatment:** **Octreotide** (Somatostatin analogue) is used to manage symptoms and "Carcinoid Crisis."

Q: Diffuse esophageal spasm is best diagnosed by which of the following investigations?

Manometry. **Explanation:** **Diffuse Esophageal Spasm (DES)**, now often referred to as Distal Esophageal Spasm, is a primary motility disorder characterized by uncoordinated, non-peristaltic contractions of the esophageal body. **Why Manometry is the Correct Answer:** High-resolution manometry is the **gold standard** for diagnosing esophageal motility disorders [1]. It provides a definitive physiological assessment of esophageal pressure and coordination. In DES, manometry classically reveals simultaneous, multi-peaked, high-amplitude contractions [2]. The diagnostic hallmark on modern manometry is a **Distal Latency (DL) of <4.5 seconds** in at least 20% of swallows, indicating premature contractions. **Analysis of Incorrect Options:** * **Endoscopy (A):** Usually appears normal in DES. Its primary role is to rule out structural lesions like malignancy or esophagitis (pseudo-achalasia) [1]. * **Barium Swallow (C):** While it may show the classic **"Corkscrew esophagus"** or "Rosary bead" appearance due to tertiary contractions, this is only present in about 50% of patients. It is suggestive but not diagnostic. * **CT Scan (D):** This is an imaging modality for structural abnormalities (e.g., tumors, lymphadenopathy) and has no role in diagnosing functional motility disorders. **NEET-PG High-Yield Pearls:** * **Clinical Presentation:** Intermittent chest pain (mimicking angina) and dysphagia to both solids and liquids, often triggered by cold liquids or stress [2]. * **Radiology:** "Corkscrew esophagus" on Barium swallow. * **Treatment:** First-line includes Nitrates or Calcium Channel Blockers (CCBs) to relax smooth muscle [2]. Endoscopic Botox injection or Peroral Endoscopic Myotomy (POEM) are considered in refractory cases. * **Key Differentiator:** Unlike Achalasia, the Lower Esophageal Sphincter (LES) relaxation is usually normal in DES.

Question 1

A 60-year-old man with a known history of hemochromatosis, cirrhosis, and portal hypertension presented to the emergency department with altered mental status. The patient's attendant reported that over the last three days, the patient has become confused. There is no history of melena or hematemesis. For chronic ascites, diet control and spironolactone are being administered regularly. In the past, the patient experienced an episode of variceal bleeding for which he was prescribed propranolol, and no further episodes have occurred. On examination, the patient is not well-oriented to time and place but is oriented to person. He is afebrile, and his vital signs are stable; however, ascites and asterixis are notable. Laboratory investigations show a hemoglobin of 10.1 g/dL, creatinine of 1.4 mg/dL, and blood urea nitrogen of 45 mg/dL. Paracentesis revealed clear fluid with 800 WBC (40% neutrophils). Which statement regarding this condition is false?

Accepted Answer

Ascites is often preceded by infection.

Answer

Clinical features include abdominal pain, fever, leukocytosis, and altered mental status.

Answer

Ascitic fluid protein is typically 1 gm/dL.

Answer

Common causative organisms are Gram-negative bacteria.

Question 2

Which of the following statements is true about ascites?

Accepted Answer

Ultrasound can detect as little as 100 ml of peritoneal fluid.

Answer

In hemorrhagic ascites, the RBC count is > 1000/mm³.

Answer

In spontaneous bacterial peritonitis (SBP), the WBC count is > 500/mm³.

Answer

Large-volume paracentesis is indicated in SBP.

Question 3

All of the following can predispose to non-cirrhotic portal fibrosis, EXCEPT:

Accepted Answer

Radiation exposure

Answer

Xenobiotics exposure

Answer

Arsenic contaminated water

Answer

Repeated intestinal parasitic infections

Question 4

All of the following are true about amoebic liver abscess except?

Accepted Answer

Hepatocellular jaundice is a common presentation.

Answer

The pus is sterile.

Answer

Amoebae reach the right lobe more frequently than the left lobe.

Answer

Intercostal tenderness may be present.

Question 5

A 40-year-old male with a history of jaundice and ascites is a known alcoholic. Which of the following statements is true regarding his condition?

Accepted Answer

Decreased liver span

Answer

AST/ALT ratio < 2

Answer

Polymorphonuclear count > 5500/L

Answer

Increased serum lactate dehydrogenase

Question 6

Which of the following parameters is NOT included in the MELD score calculation?

Accepted Answer

Blood Urea

Answer

INR

Answer

Serum Bilirubin

Answer

Serum Creatinine

Question 7

A 39-year-old female presents with chronic abdominal cramps, watery diarrhea, and periodic facial flushing. Examination reveals wheezing and a slightly enlarged liver. Workup reveals several masses within the liver and a large mass in the small intestine. Which of the following substances is likely to be elevated in her urine?

Accepted Answer

5-HIAA

Answer

Aminolevulinic acid (ALA)

Answer

FIGLU

Answer

Norepinephrine

Question 8

Which of the following are known to produce tropical calcific pancreatitis (fibrocalculous pancreatic diabetes)?

Accepted Answer

Malnutrition, Lithostatin (pancreatic stone protein) deficiency, and Cassava tuber only

Answer

Lithostatin (pancreatic stone protein) deficiency, Cassava tuber, and Oxidant stress (heightened cytochrome P-450 activity) only

Answer

Malnutrition and Oxidant stress (heightened cytochrome P-450 activity) only

Answer

Malnutrition, Lithostatin (pancreatic stone protein) deficiency, Cassava tuber, and Oxidant stress (heightened cytochrome P-450 activity)

Question 9

A 40-year-old male patient presented with mild abdominal pain, mild constipation with a feeling of incomplete evacuation, and mucus in stools for the past four years. On examination, tenderness is present in the left iliac fossa. What is the most likely diagnosis?

Accepted Answer

Diverticular disease of the colon

Answer

Ulcerative colitis

Answer

Irritable bowel syndrome

Answer

Carcinoma of the colon

Question 10

Diffuse esophageal spasm is best diagnosed by which of the following investigations?

Accepted Answer

Manometry

Answer

Endoscopy

Answer

Barium swallow

Answer

CT scan

Gastroenterology — MCQs

Gastroenterology — MCQs

On this page

Practice by Chapter

Want unlimited practice?