Gastroenterology Practice Questions

Q: Which of the following is true for Gilbert syndrome, except?

Causes cirrhosis. Gilbert Syndrome is a common, benign hereditary condition characterized by mild, unconjugated hyperbilirubinemia. It is caused by a reduced activity of the enzyme UDP-glucuronosyltransferase (UGT1A1), which is responsible for conjugating bilirubin in the liver [1]. Why Option A is the correct answer (False statement): Gilbert syndrome is a benign condition. It does not cause structural damage to the liver, inflammation, or fibrosis. Therefore, it never leads to cirrhosis or progressive liver disease [1]. The prognosis is excellent, and no treatment is required. Analysis of other options: * Option B (Inheritance): While most commonly associated with an autosomal recessive mutation in the UGT1A1 gene promoter (A(TA)7TAA), it can exhibit autosomal dominant patterns in certain populations or due to missense mutations [2]. In the context of NEET-PG, it is often classified as having varied inheritance but is fundamentally a genetic deficiency. * Option C (Normal LFTs): Apart from an isolated rise in indirect (unconjugated) bilirubin (usually <4 mg/dL), all other liver function tests—including ALT, AST, Alkaline Phosphatase, and Albumin—remain completely normal [2]. * Option D (Normal Histology): Since there is no hepatocellular injury, a liver biopsy (though rarely indicated) would show normal liver architecture and histology. High-Yield Clinical Pearls for NEET-PG: * Triggers: Jaundice is typically precipitated by stress, fasting (starvation), infection, or strenuous exercise [2]. * Diagnosis: Suspect Gilbert’s if there is isolated unconjugated hyperbilirubinemia with normal hemoglobin (to rule out hemolysis). * Caloric Restriction Test: A classic (though historical) diagnostic aid where fasting leads to a significant rise in serum bilirubin [2]. * Phenobarbital: Can decrease bilirubin levels by inducing the residual UGT1A1 enzyme [1].

Q: Chronic inflammatory bowel disease is associated with:

Primary sclerosing cholangitis. **Explanation:** **Primary Sclerosing Cholangitis (PSC)** is the most common and characteristic hepatobiliary manifestation associated with **Inflammatory Bowel Disease (IBD)**, particularly **Ulcerative Colitis (UC)** [1]. Approximately 70–80% of patients with PSC have underlying UC, whereas only about 4–5% of UC patients develop PSC. The association is stronger with UC than with Crohn’s disease. PSC is characterized by chronic inflammation, destruction, and fibrosis of both intrahepatic and extrahepatic bile ducts, leading to a "beaded" appearance on imaging (MRCP/ERCP). **Analysis of Options:** * **A. Chronic hepatitis:** While autoimmune hepatitis can overlap with PSC (Overlap Syndrome), it is not the primary or most specific association with IBD [1]. * **B. Fibrosis:** This is a generic pathological process. While PSC involves periductal "onion-skin" fibrosis, "fibrosis" alone is not a specific disease entity associated with IBD. * **C. Cholangiosarcoma:** Patients with PSC have a significantly increased risk of developing cholangiocarcinoma. However, PSC is the primary disease association, while cholangiocarcinoma is a secondary malignant complication. * **D. Primary Sclerosing Cholangitis:** This is the correct answer due to the strong, well-documented epidemiological and clinical link with IBD [1]. **High-Yield Clinical Pearls for NEET-PG:** * **p-ANCA:** Often positive in both UC and PSC (even in the absence of UC) [1]. * **Colectomy:** Interestingly, performing a colectomy for UC does **not** improve the progression or prognosis of PSC. * **Cancer Risk:** Patients with both UC and PSC have a higher risk of **Colorectal Carcinoma** compared to those with UC alone, necessitating more frequent screening. * **Gold Standard Investigation:** MRCP is the initial diagnostic test of choice; ERCP shows the classic "beaded" appearance.

Q: All of the following are symptoms of VIPomas except?

Thromboembolism. Explanation: VIPoma (Vasoactive Intestinal Peptide-secreting tumor) is a rare neuroendocrine tumor, usually located in the pancreas [1]. It is characterized by the **WDHA syndrome**: **W**atery **D**iarrhea, **H**ypokalemia, and **A**chlorhydria (also known as Verner-Morrison syndrome). 1. **Why Thromboembolism is the correct answer:** Thromboembolism is **not** a characteristic feature of VIPomas. It is, however, a classic paraneoplastic manifestation of **Glucagonomas** (associated with Necrolytic Migratory Erythema) or **Trousseau syndrome** associated with pancreatic adenocarcinoma. 2. **Analysis of incorrect options:** * **Watery Diarrhea:** VIP stimulates intestinal secretion of water and electrolytes and inhibits gastric acid secretion [1]. This results in massive, "tea-colored" secretory diarrhea (often >3L/day) that persists even during fasting. * **Hypokalemia:** The profound diarrhea leads to significant fecal loss of potassium, resulting in muscle weakness and cardiac arrhythmias. * **Flushing:** VIP acts as a potent vasodilator [1]. Approximately 20% of patients experience episodes of cutaneous flushing, similar to carcinoid syndrome. **Clinical Pearls for NEET-PG:** * **Location:** 90% are in the tail of the pancreas; in children, they are often extra-pancreatic (ganglioneuromas). * **Diagnosis:** Elevated fasting plasma VIP levels (>200 pg/mL). * **Associated Electrolyte Abnormalities:** Hypokalemia, **Hypercalcemia** (due to VIP-induced bone resorption), and **Hyperglycemia** (due to glycogenolysis). * **Treatment:** Initial stabilization with IV fluids and **Octreotide** (somatostatin analog) to control diarrhea, followed by surgical resection.

Q: A 47-year-old man with known liver cirrhosis presents with unresponsiveness. He flexes his elbows and wrists when stimulated, opens his eyes only when his sternum is rubbed, and groans without forming words. What is this patient's Glasgow Coma Scale (GCS) score?

7. To determine the correct Glasgow Coma Scale (GCS) score, we must evaluate the three components: Eye Opening (E), Verbal Response (V), and Motor Response (M). Conscious level should be measured using the Glasgow Coma Scale (GCS) to monitor improvement or deterioration [1]. **1. Component Analysis:** * **Eye Opening (E):** The patient opens his eyes only when his sternum is rubbed (painful stimulus). This corresponds to **E2**. * **Verbal Response (V):** The patient groans without forming recognizable words (incomprehensible sounds). This corresponds to **V2**. * **Motor Response (M):** The patient flexes his elbows and wrists (decorticate posturing/abnormal flexion) when stimulated. This corresponds to **M3**. **Total GCS = E2 + V2 + M3 = 7.** **2. Analysis of Incorrect Options:** * **Option A (6):** This would be the score if the patient showed decerebrate posturing (M2) instead of decorticate (M3), or if there were no verbal response (V1). * **Option C (8):** This would be the score if the patient localized pain (M4) or uttered inappropriate words (V3). * **Option D (9):** This would be the score if the patient withdrew from pain (M4) and used inappropriate words (V3). **3. NEET-PG High-Yield Pearls:** * **Mnemonic for Motor (Old):** **6** (Obeys), **5** (Localizes), **4** (Withdraws), **3** (Abnormal Flexion/Decorticate), **2** (Extension/Decerebrate), **1** (Nil). * **Decorticate vs. Decerebrate:** Remember **"COR"** in De**cor**ticate—the arms move toward the **"CORe"** (flexion). Decerebrate (extension) usually indicates a more caudal brainstem injury and a worse prognosis. * **Clinical Significance:** A GCS score of **≤ 8** is the traditional threshold for "Coma" and often indicates the need for endotracheal intubation to protect the airway ("GCS of 8, intubate") [2]. * **Context:** In a cirrhotic patient, this presentation strongly suggests Grade IV Hepatic Encephalopathy.

Q: Which imaging modality is considered the gold standard for diagnosing Crohn's disease?

CT enteroclysis. **Explanation:** **CT Enteroclysis (CTE)** is currently considered the gold standard for diagnosing and evaluating Crohn’s disease. Unlike standard imaging, enteroclysis involves the administration of neutral contrast via a nasojejunal tube to achieve maximal bowel distension. This allows for superior visualization of the mucosal surface, wall thickness, and transmural involvement. It is highly sensitive for detecting early mucosal lesions, strictures, and extraluminal complications like fistulae or abscesses. **Why other options are incorrect:** * **Upper GI series:** While useful for visualizing the proximal GI tract, it lacks the sensitivity to detect transmural involvement or extraluminal complications and provides poor visualization of the distal ileum (the most common site for Crohn's). * **Capsule endoscopy:** Though excellent for detecting early mucosal erosions in the small bowel, it is **contraindicated** if a stricture is suspected (due to the risk of capsule retention) and cannot evaluate extraluminal disease. * **CECT:** Standard CECT is useful in acute settings but lacks the bowel distension required to accurately differentiate between active inflammation and normal collapsed loops of bowel [1]. **High-Yield Clinical Pearls for NEET-PG:** * **MRE (Magnetic Resonance Enterography):** Often preferred in clinical practice over CTE to avoid ionizing radiation, especially since Crohn’s patients require frequent follow-up [1]. * **String Sign of Kantor:** A classic radiological finding in Crohn’s (terminal ileum narrowing) seen on barium studies [1]. * **Cobblestoning:** A characteristic endoscopic finding due to deep longitudinal and transverse ulcers. * **Skip Lesions:** Crohn's is characterized by discontinuous involvement, unlike the continuous spread seen in Ulcerative Colitis.

Q: Regarding hepatic encephalopathy, which of the following statements is false?

Decreased GABA. ### Explanation Hepatic Encephalopathy (HE) is a complex neuropsychiatric syndrome caused by liver failure or portosystemic shunting, leading to the accumulation of neurotoxic substances in the systemic circulation [1]. **Why Option C is False:** In hepatic encephalopathy, there is an **increase** in Gamma-Aminobutyric Acid (GABA) activity, not a decrease. GABA is the primary inhibitory neurotransmitter in the CNS. In liver failure, the liver fails to clear GABA produced by gut bacteria. Furthermore, there is an increased expression of GABA-A receptors and an accumulation of endogenous benzodiazepine-like compounds, leading to excessive neural inhibition and the characteristic depressed consciousness seen in HE. **Analysis of Other Options:** * **A. Increased Ammonia:** This is the hallmark of HE [1]. Ammonia ($NH_3$) crosses the blood-brain barrier and is converted to glutamine by astrocytes, causing osmotic swelling and cerebral edema. * **B. Increased Mercaptans:** These are sulfur-containing compounds derived from the bacterial metabolism of methionine. They contribute to the characteristic breath odor known as *Fetor Hepaticus* [2] and act synergistically with ammonia to cause neurotoxicity. * **D. Increased Short-Chain Fatty Acids (SCFAs):** Valeric, butyric, and octanoic acids are often elevated in HE. They interfere with mitochondrial function and energy metabolism in the brain. **NEET-PG High-Yield Pearls:** * **Precipitating Factors:** Infection (SBP), GI bleed, hypokalemia, constipation, and dehydration. * **Asterixis (Flapping Tremor):** A classic clinical sign (negative myoclonus). * **Treatment Gold Standard:** **Lactulose** (acidifies the gut to trap $NH_4^+$) and **Rifaximin** (non-absorbable antibiotic to reduce ammonia-producing bacteria). * **EEG Finding:** Characteristic **triphasic waves** are seen in Grade II/III encephalopathy [2].

Q: A 47-year-old woman presents with cramping, colicky abdominal pain that began several hours after a fatty meal. The pain slowly increased in intensity over several hours and has occurred in similar episodes over the past few months with intervening pain-free periods. Physical examination reveals tenderness in the right upper quadrant. She also reports shoulder/back pain near the right lower scapula. Following diagnostic studies, the patient undergoes surgery. During the procedure, the surgeon inserts fingers from right to left behind the hepatoduodenal ligament. Which of the following structures does the surgeon's fingers enter?

Epiploic foramen. The clinical presentation of colicky right upper quadrant (RUQ) pain triggered by fatty meals, radiating to the right scapula (**Boas' sign**), is classic for **biliary colic** or cholecystitis [1]. The surgical maneuver described—inserting fingers behind the hepatoduodenal ligament from right to left—is the technique used to access the **Epiploic foramen (Foramen of Winslow)**. **1. Why the Correct Answer is Right:** The Epiploic foramen is the natural communication between the **greater sac** and the **lesser sac (omental bursa)**. Its boundaries are high-yield for exams: * **Anterior:** Hepatoduodenal ligament (containing the Portal triad: Portal vein, Hepatic artery, and Common bile duct). * **Posterior:** Inferior Vena Cava (IVC) and right crus of the diaphragm. * **Superior:** Caudate lobe of the liver. * **Inferior:** First part of the duodenum. By passing fingers behind the hepatoduodenal ligament, the surgeon enters this foramen to perform the **Pringle Maneuver** (compressing the portal triad to control hepatic bleeding). **2. Why Incorrect Options are Wrong:** * **A & B:** The Ampulla of Vater and Common bile duct are microscopic or internal tubular structures. They cannot be "entered" by a surgeon’s fingers during gross manual exploration of the peritoneal cavity. * **D:** The surgeon is moving *from* the greater sac *into* the lesser sac. The space behind the ligament is the entry point to the lesser sac. **Clinical Pearls for NEET-PG:** * **Pringle Maneuver:** Clamping the hepatoduodenal ligament in the epiploic foramen stops bleeding from the hepatic artery and portal vein but NOT from the hepatic veins or IVC. * **Internal Hernia:** The epiploic foramen is a potential site for internal herniation of the small bowel. * **Boas' Sign:** Hyperesthesia below the right scapula due to phrenic nerve irritation (C3-C5) in gallbladder disease [1].

Question 1

Which of the following is true for Gilbert syndrome, except?

Accepted Answer

Causes cirrhosis

Answer

Autosomal dominant inheritance

Answer

Normal liver function tests

Answer

Normal liver histology

Question 2

Which of the following statements about Ulcerative colitis is false?

Accepted Answer

All layers of the bowel wall are involved.

Answer

Malabsorption can occur.

Answer

Backwash ileitis is seen in 10-15% of cases.

Answer

Mesalazine is used to maintain remission.

Question 3

Chronic inflammatory bowel disease is associated with:

Accepted Answer

Primary sclerosing cholangitis

Answer

Chronic hepatitis

Answer

Fibrosis

Answer

Cholangiosarcoma

Question 4

All of the following are symptoms of VIPomas except?

Accepted Answer

Thromboembolism

Answer

Watery Diarrhoea

Answer

Hypokalemia

Answer

Flushing

Question 5

Which of the following manifestations of Crohn's disease does not respond to or occurs after treatment?

Accepted Answer

Pyoderma gangrenosum

Answer

Primary sclerosing colitis

Answer

Erythema nodosum

Answer

Nephrolithiasis

Question 6

A 47-year-old man with known liver cirrhosis presents with unresponsiveness. He flexes his elbows and wrists when stimulated, opens his eyes only when his sternum is rubbed, and groans without forming words. What is this patient's Glasgow Coma Scale (GCS) score?

Accepted Answer

7

Answer

6

Answer

8

Answer

9

Question 7

Which imaging modality is considered the gold standard for diagnosing Crohn's disease?

Accepted Answer

CT enteroclysis

Answer

Upper GI series

Answer

Capsule endoscopy

Answer

CECT (Contrast-enhanced computed tomography)

Question 8

Regarding hepatic encephalopathy, which of the following statements is false?

Accepted Answer

Decreased GABA

Answer

Increased ammonia in blood

Answer

Increased mercaptans in blood

Answer

Increased short chain fatty acids

Question 9

A 47-year-old woman presents with cramping, colicky abdominal pain that began several hours after a fatty meal. The pain slowly increased in intensity over several hours and has occurred in similar episodes over the past few months with intervening pain-free periods. Physical examination reveals tenderness in the right upper quadrant. She also reports shoulder/back pain near the right lower scapula. Following diagnostic studies, the patient undergoes surgery. During the procedure, the surgeon inserts fingers from right to left behind the hepatoduodenal ligament. Which of the following structures does the surgeon's fingers enter?

Accepted Answer

Epiploic foramen

Answer

Ampulla of Vater

Answer

Common bile duct

Answer

Greater peritoneal sac

Question 10

A patient on antibiotics for treatment for peritonitis presents with mucus diarrhoea. What is the most probable cause?

Accepted Answer

Antibiotic associated diarrhoea

Answer

Ulcerative colitis

Answer

Activation of latent tuberculosis

Answer

Gastritis

Gastroenterology — MCQs

Gastroenterology — MCQs

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