Gastroenterology Practice Questions

Q: The "corkscrew appearance" is characteristic of which of the following conditions?

Diffuse esophageal spasm. The **"corkscrew appearance"** on a barium swallow is the classic radiological hallmark of **Diffuse Esophageal Spasm (DES)**. **Why it occurs:** DES is a motility disorder characterized by uncoordinated, non-peristaltic, and high-amplitude contractions of the esophageal smooth muscle [1]. These simultaneous contractions compartmentalize the esophagus, creating multiple tertiary waves that appear as "beading" or a "corkscrew" on imaging [1]. Patients typically present with intermittent chest pain (mimicking angina) and dysphagia to both solids and liquids [1]. **Analysis of Incorrect Options:** * **Carcinoma of the esophagus:** Typically presents with a **"rat-tail"** appearance (irregular narrowing) or an **"apple-core"** lesion (annular constriction) due to malignant infiltration [3]. * **Hypertrophic pyloric stenosis:** Characterized by the **"string sign"** (narrowed pyloric canal) or **"beak sign"** on barium studies, and a "doughnut" or "target" sign on ultrasound. * **Sigmoid volvulus:** Presents on an abdominal X-ray as a **"coffee bean"** sign or an **"omega"** sign; on a barium enema, it shows a **"bird’s beak"** deformity at the site of the twist. **NEET-PG High-Yield Pearls:** * **Manometry** is the gold standard for diagnosing DES (showing >20% premature contractions) [1]. * **Nutcracker Esophagus:** High-amplitude *peristaltic* contractions (unlike the uncoordinated contractions in DES) [1]. * **Bird’s Beak Appearance:** Classic for **Achalasia Cardia** (failure of LES relaxation) [2]. * **Treatment of DES:** Nitrates, Calcium Channel Blockers (CCBs), or Botulinum toxin injection to relax the smooth muscle [1].

Q: When ascitic fluid is a typical transudate but contains more than 250 WBC/cmm, what is the probable diagnosis?

Cirrhotic ascites with occult peritoneal infection. The diagnosis of ascitic fluid is based on the **Serum-Ascites Albumin Gradient (SAAG)** and the **Absolute Neutrophil Count (ANC)**. [1] **1. Why Option D is Correct:** In a patient with cirrhosis, the ascitic fluid is typically a **transudate** (SAAG ≥ 1.1 g/dL) due to portal hypertension. [1] However, the normal WBC count in uncomplicated cirrhotic ascites is <250 cells/mm³. When the WBC count exceeds **250 cells/mm³** (specifically neutrophils), it indicates an inflammatory response within the peritoneum. In the absence of a surgically treatable source of infection, this is diagnostic of **Spontaneous Bacterial Peritonitis (SBP)** or occult peritoneal infection. **2. Why Other Options are Incorrect:** * **A. Congestive Heart Failure (CHF):** While CHF produces a high SAAG (transudate), the WBC count is typically very low ( 2.5 g/dL) is more characteristic of CHF than high cell count. [1] * **B. Tubercular Ascites:** This typically presents as an **exudate** (SAAG < 1.1 g/dL) with a high protein count and a predominance of **lymphocytes**, not just a general increase in WBCs. [1] * **C. Cirrhosis of Liver:** Uncomplicated cirrhosis presents as a transudate, but the WBC count must be **<250 cells/mm³**. Once it crosses this threshold, it is no longer "simple" cirrhotic ascites. [1] **High-Yield NEET-PG Pearls:** * **SBP Definition:** Ascitic fluid PMN (polymorphonuclear leukocyte) count **≥ 250 cells/mm³** with a positive culture. * **Culture-Negative Neutrocytic Ascites (CNNA):** PMN ≥ 250 cells/mm³ but negative culture; treated the same as SBP. * **Mnemonic:** High SAAG (≥ 1.1) = Portal Hypertension (Cirrhosis, CHF, Budd-Chiari). Low SAAG (< 1.1) = Non-portal hypertension (TB, Malignancy, Nephrotic syndrome). [1] * **Treatment of choice for SBP:** Third-generation cephalosporins (e.g., **Cefotaxime**).

Q: A 25-year-old male presents with pigmented macules on the palms, soles, and oral mucosa. He also has anemia and abdominal pain. What is the most probable diagnosis?

Peutz-Jeghers syndrome. ### Explanation **Correct Answer: C. Peutz-Jeghers syndrome (PJS)** **1. Why it is correct:** Peutz-Jeghers syndrome is an autosomal dominant condition characterized by the mutation of the **STK11 (LKB1)** gene on chromosome 19. The clinical hallmark is the presence of **mucocutaneous hyperpigmentation** (melanotic macules) on the lips, buccal mucosa, palms, and soles. These patients develop multiple **hamartomatous polyps** throughout the GI tract (most commonly the small intestine) [1]. These polyps often lead to complications like **intussusception**, chronic GI bleeding (causing **anemia**), and abdominal pain. **2. Why the other options are incorrect:** * **Albright’s syndrome (McCune-Albright):** Characterized by a triad of polyostotic fibrous dysplasia, precocious puberty, and *Café-au-lait* spots (large, irregular "Coast of Maine" borders), not small mucosal macules. * **Cushing’s syndrome:** Presents with systemic features like truncal obesity, striae, and hypertension. While hyperpigmentation can occur in ACTH-dependent causes (Addisonian type), it lacks the characteristic hamartomatous polyposis and mucosal distribution seen here. * **Incontinentia pigmenti:** An X-linked dominant dermatosis that follows the Lines of Blaschko. It progresses through stages (vesicular, verrucous, hyperpigmented, and atrophic) and is usually seen in females, as it is typically lethal in males. **3. NEET-PG High-Yield Pearls:** * **Inheritance:** Autosomal Dominant (STK11 gene). * **Polyp Type:** Hamartomatous (characterized by a "branching tree" appearance of smooth muscle) [1]. * **Cancer Risk:** Significantly increased risk of GI (colorectal, pancreatic) and extra-GI malignancies (breast, ovary, cervix, and Sertoli cell tumors of the testes) [1]. * **Most common site of polyps:** Small intestine (Jejunum > Ileum > Duodenum). * **Most common complication:** Intussusception.

Q: Regarding Schatzki's ring, what is the true statement?

It is located at the lower esophagus.. Schatzki’s ring (also known as a B-ring) is a smooth, benign, circumferential thin mucosal narrowing located at the squamocolumnar junction of the lower esophagus. It is one of the most common causes of intermittent solid food dysphagia ("Steakhouse Syndrome"). Analysis of Options: * Option C (Correct): Schatzki’s rings are strictly located at the distal esophagus, specifically at the junction of the esophageal and gastric mucosa (Z-line) [1]. They are almost always associated with a hiatal hernia [1]. * Option A: The lower esophagus consists primarily of smooth muscle. Skeletal muscle is found in the upper third of the esophagus. * Option B: Rings or webs in the upper esophagus are characteristic of Plummer-Vinson Syndrome, not Schatzki’s ring. * Option D: A Schatzki’s ring is a mucosal ring, meaning it consists only of mucosa and submucosa. It does not contain the muscularis propria layer (unlike esophageal "A-rings" or contractile rings). High-Yield Clinical Pearls for NEET-PG: * Clinical Presentation: Intermittent dysphagia to solids, often triggered by poorly chewed meat or bread. * Diagnosis: Barium Swallow is more sensitive than endoscopy for detection; it appears as a thin, diaphragm-like transverse band. * Association: Strongly associated with Hiatal Hernia and sometimes GERD [1]. * Treatment: Reassurance and dietary modification (chewing thoroughly); if symptomatic, endoscopic dilation is the treatment of choice.

Q: A 35-year-old woman presents with jaundice and is evaluated in the emergency department. For several days, she has experienced mild flu-like symptoms including anorexia, nausea, vomiting, fatigue, low-grade fever, and malaise. This morning, she noticed her urine was brown, and she has also developed moderate, steady pain in the right upper quadrant of her abdomen. She has no history of similar episodes. Physical examination reveals jaundice and an enlarged, tender liver. Blood chemistry studies show alanine aminotransferase (ALT) of 15,000 mIU/L, aspartate aminotransferase (AST) of 11,000 mIU/L, and alkaline phosphatase of 100 U/L. Which of the following is the most likely diagnosis?

Acute hepatitis. **Explanation:** The clinical presentation and laboratory findings are classic for **Acute Hepatitis**. **1. Why Acute Hepatitis is correct:** The patient presents with a prodrome of "flu-like" symptoms (anorexia, malaise, fever) followed by jaundice and right upper quadrant pain, which is the typical clinical course of acute viral or toxic hepatitis [2]. The hallmark of this case is the **massive elevation of serum aminotransferases (ALT/AST >10,000 U/L)**. In clinical practice, transaminase levels exceeding 1,000–5,000 U/L are highly suggestive of acute hepatocellular injury, most commonly caused by acute viral hepatitis (A, B, or E), drug-induced liver injury (e.g., Acetaminophen), or ischemic hepatitis ("shock liver") [1]. **2. Why the other options are incorrect:** * **Chronic Hepatitis:** This typically presents with mild to moderate elevations in transaminases (usually <500 U/L) and persists for over six months [3]. It does not cause the acute, massive "spike" seen here. * **Gallstone Disease (Choledocholithiasis):** While it causes RUQ pain and jaundice, it typically presents with a **cholestatic pattern** (disproportionately high Alkaline Phosphatase) rather than extreme transaminase elevation. * **Hepatic Cirrhosis:** This is a chronic, end-stage fibrotic process. Transaminases are often near normal or only slightly elevated because there is little functional parenchyma left to leak enzymes. **NEET-PG High-Yield Pearls:** * **ALT > AST:** Typical for most forms of acute viral hepatitis. * **AST > ALT (2:1 ratio):** Highly suggestive of **Alcoholic Hepatitis** (though levels rarely exceed 500 U/L in alcoholic cases). * **Highest Transaminase Levels (>10,000 U/L):** Usually seen in **Ischemic Hepatitis**, **Acetaminophen toxicity**, or **Acute Viral Hepatitis** [1]. * **Bilirubinuria:** The "brown urine" indicates conjugated hyperbilirubinemia, confirming the jaundice is hepatic or post-hepatic in origin [2].

Q: All of the following can be seen as post-diarrheal complications except?

Nephritic syndrome. **Explanation:** The correct answer is **Nephritic Syndrome**. While certain diarrheal infections can lead to renal involvement, they typically manifest as acute kidney injury (AKI) or thrombotic microangiopathy rather than a classic nephritic syndrome (which is characterized by hematuria, hypertension, and RBC casts, usually following streptococcal skin or throat infections) [1]. **Why the other options are incorrect:** * **Hemolytic Uremic Syndrome (HUS):** This is a classic post-diarrheal complication, most commonly associated with **Enterohemorrhagic *E. coli* (O157:H7)** and *Shigella dysenteriae* [1]. It is characterized by the triad of microangiopathic hemolytic anemia, thrombocytopenia, and acute renal failure [1]. * **Reactive Arthritis:** Formerly known as Reiter’s Syndrome, this sterile joint inflammation occurs following enteric infections with organisms like ***Salmonella*, *Shigella*, *Campylobacter*, or *Yersinia***. It often presents with the "can't see, can't pee, can't climb a tree" triad (conjunctivitis, urethritis, arthritis). * **Guillain-Barré Syndrome (GBS):** This is an acute post-infectious polyneuropathy. ***Campylobacter jejuni*** is the most common antecedent pathogen identified in GBS cases due to molecular mimicry between bacterial lipooligosaccharides and human nerve gangliosides. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause of HUS in children:** Shiga-toxin producing *E. coli* (STEC) [1]. * **Most common trigger for GBS:** *Campylobacter jejuni*. * **HLA-B27 association:** Strongly linked with the development of Reactive Arthritis following infectious diarrhea. * **Yersinia enterocolitica:** Can mimic acute appendicitis (pseudoappendicitis) and is a frequent trigger for reactive arthritis.

Q: A 30-year-old woman presents with dysphagia for both solids and liquids. Barium swallow shows a 'parrot beak' appearance. Esophageal manometry reveals increased lower esophageal sphincter (LES) pressure. What is the appropriate management?

All of the above. ### Explanation **Diagnosis:** The clinical presentation of dysphagia for both solids and liquids, the classic **'parrot beak' (or bird-beak)** appearance on barium swallow, and increased LES pressure on manometry are diagnostic of **Achalasia Cardia**. **Why 'All of the above' is correct:** The primary goal in treating Achalasia is to reduce the Lower Esophageal Sphincter (LES) pressure to facilitate the passage of food. Pharmacological management is typically reserved for patients who are not candidates for or refuse definitive procedures (like Balloon Dilatation or Heller’s Myotomy). * **Nitrates (e.g., Isosorbide dinitrate):** These act as nitric oxide donors, promoting smooth muscle relaxation of the LES. * **Calcium Channel Blockers (e.g., Nifedipine):** These inhibit calcium influx into smooth muscle cells, reducing LES tone. * **Botulinum Toxin:** When injected endoscopically into the LES, it inhibits the release of acetylcholine from excitatory neurons, leading to muscle paralysis and decreased pressure. **Clinical Pearls for NEET-PG:** * **Gold Standard Investigation:** Esophageal Manometry (shows aperistalsis and incomplete LES relaxation). * **Most Effective Non-Surgical Treatment:** Pneumatic (Balloon) Dilatation. * **Definitive Surgical Treatment:** Modified Heller’s Myotomy (often performed with a partial fundoplication to prevent GERD). * **POEM (Per-Oral Endoscopic Myotomy):** A newer, minimally invasive endoscopic technique gaining popularity. * **Triad of Achalasia:** 1. Incomplete LES relaxation, 2. Increased LES tone, 3. Aperistalsis of the esophageal body.

Question 1

The "corkscrew appearance" is characteristic of which of the following conditions?

Accepted Answer

Diffuse esophageal spasm

Answer

Carcinoma of the esophagus

Answer

Hypertrophic pyloric stenosis

Answer

Sigmoid volvulus

Question 2

Which one of the following is not advocated in the management of hepatic encephalopathy?

Accepted Answer

High protein diet more than 60 grams/day

Answer

Oral Lactulose

Answer

Intravenous Glucose drip

Answer

Colonic washout if tests for blood in stool are positive

Question 3

When ascitic fluid is a typical transudate but contains more than 250 WBC/cmm, what is the probable diagnosis?

Accepted Answer

Cirrhotic ascites with occult peritoneal infection

Answer

Congestive heart failure (CHF)

Answer

Tubercular ascites

Answer

Cirrhosis of liver

Question 4

A 25-year-old male presents with pigmented macules on the palms, soles, and oral mucosa. He also has anemia and abdominal pain. What is the most probable diagnosis?

Accepted Answer

Peutz-Jeghers syndrome

Answer

Albright's syndrome

Answer

Cushing's syndrome

Answer

Incontinentia pigmenti

Question 5

Regarding Schatzki's ring, what is the true statement?

Accepted Answer

It is located at the lower esophagus.

Answer

It has skeletal muscle.

Answer

It is located at the upper esophagus.

Answer

It contains all layers of the esophagus.

Question 6

A 35-year-old woman presents with jaundice and is evaluated in the emergency department. For several days, she has experienced mild flu-like symptoms including anorexia, nausea, vomiting, fatigue, low-grade fever, and malaise. This morning, she noticed her urine was brown, and she has also developed moderate, steady pain in the right upper quadrant of her abdomen. She has no history of similar episodes. Physical examination reveals jaundice and an enlarged, tender liver. Blood chemistry studies show alanine aminotransferase (ALT) of 15,000 mIU/L, aspartate aminotransferase (AST) of 11,000 mIU/L, and alkaline phosphatase of 100 U/L. Which of the following is the most likely diagnosis?

Accepted Answer

Acute hepatitis

Answer

Chronic hepatitis

Answer

Gallstone disease

Answer

Hepatic cirrhosis

Question 7

Which of the following statements is false?

Accepted Answer

Primary sclerosing cholangitis involves only extrahepatic bile ducts.

Answer

Primary biliary cholangitis involves only intrahepatic bile ducts.

Answer

Primary biliary cholangitis is associated with rheumatoid arthritis.

Answer

Primary sclerosing cholangitis is seen more frequently in males than females.

Question 8

All of the following can be seen as post-diarrheal complications except?

Accepted Answer

Nephritic syndrome

Answer

Hemolytic Uremic Syndrome (HUS)

Answer

Reactive arthritis

Answer

Guillain-Barré syndrome

Question 9

A 19-year-old woman presents with a tremor at rest that has progressively worsened over 6 months. She also exhibits paranoid ideation with auditory hallucinations and has been diagnosed with acute psychosis. Physical examination reveals scleral icterus, and a slit-lamp examination shows corneal Kayser-Fleischer rings. Laboratory findings include total serum protein of 5.9 g/dL, albumin of 3.1 g/dL, total bilirubin of 4.9 mg/dL, direct bilirubin of 3.1 mg/dL, AST of 128 U/L, ALT of 157 U/L, and alkaline phosphatase of 56 U/L. Which of the following additional serologic test findings is most likely to be reported in this patient?

Accepted Answer

Decreased ceruloplasmin level

Answer

Decreased alpha-1-antitrypsin level

Answer

Increased alpha-fetoprotein level

Answer

Increased ferritin level

Question 10

A 30-year-old woman presents with dysphagia for both solids and liquids. Barium swallow shows a 'parrot beak' appearance. Esophageal manometry reveals increased lower esophageal sphincter (LES) pressure. What is the appropriate management?

Accepted Answer

All of the above

Answer

Nitrates

Answer

Calcium channel blockers

Answer

Botulinum toxin

Gastroenterology — MCQs

Gastroenterology — MCQs

On this page

Practice by Chapter

Want unlimited practice?