Gastroenterology Practice Questions

Q: A 85-year-old man presents with severe crampy abdominal pain which is worse after eating, associated with frequent nausea, bloating and watery diarrhoea. His other medical problems include coronary artery disease, hypertension, hypercholesterolemia. He has a 40-pack-year smoking history. Barium enema is as shown. What is the most probable cause?

Atherosclerosis of the mesenteric arteries. ***Atherosclerosis of the mesenteric arteries*** - Classic presentation of **intestinal angina** with post-prandial crampy pain, nausea, and diarrhea in an elderly patient with multiple cardiovascular risk factors (smoking, CAD, hypertension). - Barium enema likely shows **thumbprinting pattern** characteristic of **ischemic colitis**, caused by compromised mesenteric blood flow from atherosclerotic narrowing. *Left ventricular aneurysm* - This is a **cardiac complication** that doesn't directly cause gastrointestinal symptoms or bowel ischemia. - Would present with **heart failure symptoms** like dyspnea and chest pain, not abdominal pain and diarrhea. *Transmural inflammation of the small intestine* - Describes **Crohn's disease**, which typically presents in **younger patients** with chronic symptoms and **skip lesions**. - Would show **cobblestone appearance** and strictures on imaging, not the thumbprinting pattern of ischemic colitis. *Progressive pancreatic inflammation* - Refers to **chronic pancreatitis**, which causes **epigastric pain** radiating to the back and **steatorrhea**. - Would show **pancreatic calcifications** and ductal changes on imaging, not colonic thumbprinting on barium enema.

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 used in the treatment of acute pancreatitis EXCEPT?

Antibiotics. The management of acute pancreatitis (AP) has shifted toward conservative, supportive care. The correct answer is **Antibiotics** because current guidelines (IAP/APA) recommend against their routine prophylactic use in AP, regardless of severity or the presence of sterile necrosis. ### **Explanation of Options:** * **Antibiotics (Correct Answer):** Acute pancreatitis is primarily a chemical inflammation, not a bacterial infection. Prophylactic antibiotics do not reduce the risk of infected necrosis or mortality. They are indicated **only** if there is evidence of infection (e.g., infected necrosis, cholangitis, or extra-pancreatic infections like UTI/pneumonia). * **IV Fluids:** Aggressive fluid resuscitation (preferably Ringer’s Lactate) is the cornerstone of early management to maintain pancreatic perfusion and prevent "walled-off" necrosis and organ failure. * **Analgesics:** Pain management is vital. While NSAIDs are avoided due to renal risks, opioids (like Buprenorphine or Fentanyl) are commonly used. *Note: The old teaching that Morphine causes Sphincter of Oddi spasm is clinically insignificant.* * **Nasojejunal (NJ) Feeds:** Early enteral nutrition (within 24–72 hours) is preferred over parenteral nutrition. NJ feeds help maintain the gut mucosal barrier, preventing bacterial translocation and subsequent infection of necrotic tissue. ### **High-Yield Clinical Pearls for NEET-PG:** * **Drug of Choice for Pain:** Traditionally Pethidine (due to less Sphincter of Oddi spasm), but modern practice favors multimodal analgesia. * **Nutrition:** "Enteral is better than Parenteral." If the patient tolerates it, oral feeding is started; if not, NJ tube feeding is the gold standard for severe cases. * **Antibiotic Choice:** If infection is proven, **Carbapenems** (e.g., Imipenem) are preferred due to high pancreatic tissue penetration. * **Most common cause:** Gallstones (1st), Alcohol (2nd).

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: 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.

Q: An elderly male presents to the Emergency Department following a bout of prolonged vomiting with excessive haematemesis after alcohol ingestion. What is the most likely diagnosis?

Mallory-Weiss syndrome. **Explanation:** The clinical presentation of hematemesis following repeated episodes of forceful vomiting or retching, particularly after alcohol consumption, is the classic hallmark of **Mallory-Weiss Syndrome (MWS)**. **1. Why Mallory-Weiss Syndrome is correct:** MWS involves a longitudinal mucosal laceration (tear) at the gastroesophageal junction or distal esophagus. The underlying mechanism is a sudden increase in intra-abdominal pressure (due to vomiting, retching, or coughing) against a closed glottis. In this case, the alcohol ingestion led to vomiting, which subsequently caused the tear and the "excessive hematemesis." **2. Why other options are incorrect:** * **Oesophageal Varices:** While common in alcoholics with cirrhosis, variceal bleeding usually presents as sudden, massive, painless hematemesis *without* the preceding history of non-bloody vomiting. * **Gastric Cancer:** This typically presents with chronic symptoms like weight loss, anorexia, and coffee-ground emesis or melena, rather than acute post-emetic hematemesis. * **Bleeding Disorder:** While it can exacerbate bleeding, it would not explain the specific sequence of vomiting followed by hematemesis. **3. NEET-PG High-Yield Pearls:** * **Location:** Most tears (75%) occur in the gastric mucosa just below the GE junction. * **Diagnosis:** The gold standard is **Upper GI Endoscopy**, which reveals linear mucosal tears. * **Management:** Most cases (approx. 90%) stop bleeding spontaneously with supportive care (IV fluids, PPIs). If persistent, endoscopic therapy (clipping or epinephrine injection) is used. * **Boerhaave Syndrome vs. MWS:** Boerhaave is a *transmural* perforation (full thickness) presenting with severe chest pain and pneumomediastinum (Mackler’s triad), whereas MWS is a *mucosal* tear presenting with bleeding.

Q: Which one of the following is not a feature of irritable bowel syndrome?

Rectal bleeding. **Explanation:** Irritable Bowel Syndrome (IBS) is a **functional gastrointestinal disorder** characterized by chronic abdominal pain and altered bowel habits in the absence of demonstrable organic pathology [1]. The diagnosis is primarily clinical, based on the **Rome IV Criteria**. **Why Rectal Bleeding is the Correct Answer:** Rectal bleeding is considered an **"Alarm Symptom" (Red Flag)** [1]. Since IBS does not involve mucosal inflammation, ulceration, or malignancy, it should never cause hematochezia or melena. The presence of rectal bleeding necessitates further investigation (e.g., colonoscopy) to rule out organic diseases such as Inflammatory Bowel Disease (IBD), colorectal cancer, or hemorrhoids [1]. **Analysis of Incorrect Options:** * **Abdominal Pain (A):** This is the hallmark of IBS. According to Rome IV, pain must be recurrent (at least 1 day/week in the last 3 months) and related to defecation or changes in stool frequency/form [1]. * **Constipation (B):** Altered bowel habits are central to IBS [1]. Patients are categorized into subtypes: IBS-C (Constipation predominant), IBS-D (Diarrhea predominant), or IBS-M (Mixed). * **Bloating (D):** While not a formal part of the diagnostic criteria, abdominal bloating and distension are very common subjective complaints in IBS patients due to visceral hypersensitivity and altered gas transit [1]. **NEET-PG High-Yield Pearls:** * **Rome IV Criteria:** Recurrent abdominal pain ≥1 day/week in the last 3 months associated with ≥2 of: 1. Related to defecation, 2. Change in stool frequency, 3. Change in stool form [1]. * **Red Flags (Not IBS):** Weight loss (>5kg), nocturnal diarrhea, anemia, rectal bleeding, onset after age 50, or family history of colon cancer [1]. * **Treatment:** High-fiber diet, antispasmodics (Dicyclomine), and for refractory cases, TCAs or SSRIs.

Question 1

A 85-year-old man presents with severe crampy abdominal pain which is worse after eating, associated with frequent nausea, bloating and watery diarrhoea. His other medical problems include coronary artery disease, hypertension, hypercholesterolemia. He has a 40-pack-year smoking history. Barium enema is as shown. What is the most probable cause?

Accepted Answer

Atherosclerosis of the mesenteric arteries

Answer

Left ventricular aneurysm

Answer

Transmural inflammation of the small intestine

Answer

Progressive pancreatic inflammation

Question 2

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 3

All of the following are used in the treatment of acute pancreatitis EXCEPT?

Accepted Answer

Antibiotics

Answer

Analgesics

Answer

IV fluids

Answer

Nasojejunal feeds

Question 4

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 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

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 7

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 8

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

Accepted Answer

Manometry

Answer

Endoscopy

Answer

Barium swallow

Answer

CT scan

Question 9

An elderly male presents to the Emergency Department following a bout of prolonged vomiting with excessive haematemesis after alcohol ingestion. What is the most likely diagnosis?

Accepted Answer

Mallory-Weiss syndrome

Answer

Oesophageal varices

Answer

Gastric cancer

Answer

Bleeding disorder

Question 10

Which one of the following is not a feature of irritable bowel syndrome?

Accepted Answer

Rectal bleeding

Answer

Abdominal pain

Answer

Constipation

Answer

Bloating

Gastroenterology — MCQs

Gastroenterology — MCQs

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