Gastroenterology Practice Questions

Q: Which of the following is the LEAST invasive initial treatment option for achalasia? 1. Botulinum toxin 2. Beta blockers 3. Pneumatic dilation 4. Heller's myotomy

2. Beta blockers. ***Beta blockers*** - This is incorrect as **beta blockers** are not a recognized treatment for achalasia. - Achalasia management focuses on reducing **lower esophageal sphincter (LES)** pressure, which beta blockers do not achieve [1]. *Pneumatic dilation* - While less invasive than surgery, **pneumatic dilation** involves stretching the LES using a balloon, which carries risks such as perforation [2]. - It is generally considered a more invasive intervention than endoscopic injection therapies, and not initial treatment [2]. *Heller's myotomy* - This is a **surgical procedure** to cut the muscle fibers of the LES, making it the most invasive option among those listed [2]. - It is typically reserved for cases where less invasive treatments have failed or for patients who prefer a more definitive, long-term solution. *Botulinum toxin* - **Botulinum toxin** injection into the LES is a less invasive endoscopic procedure [2]. - It temporarily relaxes the LES by inhibiting acetylcholine release, though its effects are not permanent and repeated injections may be necessary [2].

Q: The 'gold standard' for the diagnosis of GORD (Gastro-Oesophageal Reflux Disease) is

24-hour pH recording. ***24-hour pH recording*** - This method directly measures the **frequency** and **duration of acid exposure** in the esophagus, providing objective evidence of reflux. - It is considered the gold standard because it can **quantify reflux episodes** and correlate them with patient symptoms. *upper GI endoscopy* - While useful for visualizing **mucosal damage** [1] (esophagitis, strictures, Barrett's esophagus) caused by reflux, it does not directly measure or confirm reflux itself. - Many patients with GORD symptoms have **normal endoscopic findings**, making it unsuitable as the gold standard for diagnosis. *CT scan* - A CT scan is not typically used for diagnosing GORD. - It is more useful for identifying **structural abnormalities** or **complications** of reflux, such as tumors or hiatal hernias. *barium meal follow through* - This imaging technique can identify **structural abnormalities** like hiatal hernia or severe reflux events, but it is not sensitive enough to detect intermittent or mild reflux. - It provides a **snapshot** of reflux and cannot quantify the total acid exposure over a prolonged period.

Q: Motility disorders of the oesophagus are best diagnosed by

Manometry. ***Manometry*** - Oesophageal manometry is the **gold standard** for diagnosing motility disorders by directly measuring the pressure activity and coordination of oesophageal muscle contractions and sphincter function [1]. - It provides **physiologic data** critical for identifying conditions like achalasia, diffuse oesophageal spasm, and ineffective oesophageal motility; high-resolution manometry specifically allows for the accurate classification of these abnormalities [1]. *Barium meal* - A barium meal provides **structural and morphological information** and can show gross motility abnormalities, but it does not quantitatively measure pressure or coordination of contractions [1]. - It is often used as a **screening tool** and can suggest motility disorders, but manometry is needed for definitive diagnosis [1]. *Endoscopy* - Endoscopy is primarily used to visualize the **mucosa** and lumen of the oesophagus, stomach, and duodenum to rule out structural abnormalities like strictures, masses, or inflammation [1, 5]. - While it can indirectly reveal some motility issues (e.g., retained food in achalasia), it does not directly assess the **functional contractile activity** of the oesophageal muscle [1]. *Radiography* - General radiography (X-rays) of the chest or abdomen is primarily used to evaluate **gross anatomical structures** or identify abnormalities like pneumomediastinum or foreign bodies [2]. - It has **limited utility** for evaluating specific oesophageal motility disorders, unlike specialized imaging with contrast (barium swallow) or functional studies (manometry) [1, 4].

Q: Consider the following prognostic parameters of acute pancreatitis : 1. Rise in blood urea nitrogen over 5 mg/dl 2. Hematocrit decrease over 10% 3. Base deficit more than 4 mmol/L 4. Blood glucose over 10 mmol/L Which of the above parameters are important during initial 48 hours ?

1 and 2 only. ***1 and 2 only*** - A **rise in blood urea nitrogen over 5 mg/dL** and a **hematocrit decrease over 10%** within the initial 48 hours are significant early indicators of fluid sequestration and systemic inflammation, which are critical prognostic factors in acute pancreatitis [1]. - These parameters are part of common prognostic scoring systems, like the **Modified Glasgow Score** or **Ranson's Criteria**, used to assess the severity and predict outcomes [1]. *2 and 3 only* - While a **hematocrit decrease over 10%** is a relevant early prognostic indicator, a **base deficit more than 4 mmol/L** (indicating metabolic acidosis) typically emerges later or reflects more severe, established organ dysfunction. - Early prognostic assessment focuses on parameters measurable within the first 48 hours that reflect initial systemic impact. *1, 2 and 3* - **Rise in blood urea nitrogen over 5 mg/dL** and **hematocrit decrease over 10%** are valid early indicators, but a **base deficit more than 4 mmol/L** is not included in the standard initial 48-hour prognostic criteria for acute pancreatitis severity assessment for the first two days [1]. - This option incorrectly includes base deficit as a primary early prognostic parameter. *1, 3 and 4* - **Rise in blood urea nitrogen over 5 mg/dL** is a correct early prognostic parameter. However, a **base deficit more than 4 mmol/L** and **blood glucose over 10 mmol/L** are less specifically emphasized as *initial 48-hour* critical parameters in all common scoring systems. - While hyperglycemia can be present, its specific prognostic cutoff often varies, and it typically contributes to overall severity rather than being a standalone early change in the first 48 hours.

Q: To differentiate pancreatic ascites from ascites secondary to cirrhosis of the liver, the most important test is :

Abdominal paracentesis. ***Abdominal paracentesis*** - This procedure involves analyzing the **ascitic fluid**, which is crucial for distinguishing between pancreatic ascites and cirrhosis-related ascites [1]. - In **pancreatic ascites**, the fluid will have a very high **amylase** content and often a high protein level (>2.5 g/dL), whereas in **cirrhosis**, the amylase is typically normal and the protein is usually low (<2.5 g/dL) [1]. *Abdominal ultrasound* - While useful for detecting ascites and underlying liver disease (cirrhosis), it cannot definitively determine the **cause of ascites** or the specific content of the ascitic fluid [2]. - Ultrasound can visualize the pancreas but cannot reliably differentiate pancreatic ascites from other causes without **fluid analysis**. *Endoscopic retrograde cholangiopancreatography (ERCP)* - This is an **invasive procedure** primarily used for diagnosing and treating disorders of the bile ducts and pancreatic duct, such as strictures or stones. - It is not the most important or initial test for differentiating the cause of ascites, as its main role is in identifying **ductal leaks** that might lead to pancreatic ascites, rather than direct fluid analysis. *Computed tomogram (CT) scan* - CT can confirm the presence of ascites, evaluate the **pancreas** for inflammation or pseudocysts, and assess the **liver** for signs of cirrhosis [2]. - However, like ultrasound, a CT scan cannot provide the definitive **biochemical analysis** of the ascitic fluid that is necessary to distinguish pancreatic ascites from other causes.

Q: Factors important in the formation of gall stones include all of the following except :

Gall bladder motility. ***Gall bladder motility*** - While factors like gallbladder **stasis** or **hypomotility** can *contribute* to gallstone formation by allowing bile to concentrate, normal gallbladder motility itself does not directly form stones. - Efficient gallbladder emptying helps prevent the supersaturation and precipitation of cholesterol and bilirubin that lead to stone formation [2]. *Obesity* - Obesity increases the **hepatic secretion of cholesterol**, leading to more cholesterol in the bile [1]. - This increased cholesterol can lead to **supersaturation** of bile, making it prone to forming cholesterol gallstones. *Cholesterol saturation in bile* - When bile contains more cholesterol than can be kept in solution by bile salts and phospholipids, it becomes **supersaturated** [3]. - This supersaturation is a primary driver for the **precipitation of cholesterol crystals**, which aggregate to form gallstones [1]. *The size of micelles* - Micelles are small aggregates of bile salts and phospholipids that solubilize cholesterol in bile [3]. - If the **micelle size is insufficient** or their number is reduced, they cannot adequately solubilize the cholesterol, leading to its precipitation and stone formation [3].

Q: Which of the following is not associated with Acute Food Poisoning?

Tenesmus. ***Tenesmus*** - **Tenesmus** is a symptom of **inflammatory bowel disease** or other **colonic inflammation**, characterized by the sensation of incomplete defecation [1]. - While it can be associated with some forms of infectious colitis, it is **not a typical or direct symptom of acute food poisoning**, which primarily manifests with acute onset of nausea, vomiting, diarrhea, and abdominal cramps [2], [3]. *High skin surface temperature* - **High skin surface temperature** (fever) is a common symptom of acute food poisoning, as the body fights off pathogens or toxins. - It is an indication of the **systemic inflammatory response** to the ingested contaminants. *Onset with vomiting* - **Vomiting** is one of the most prominent and often initial symptoms of acute food poisoning, especially with preformed toxins [2], [3]. - It is the body's rapid mechanism to **expel harmful substances** from the gastrointestinal tract. *Leucocytosis* - **Leucocytosis** (an increase in white blood cells) is a common finding in many infections, including bacterial food poisoning. - It indicates an **active immune response** to combat the invading pathogens or toxins.

Q: The prognostic indicators in a case of portal hypertension include: 1. Serum globulin 2. Serum albumin 3. Serum bilirubin 4. Ascites Select the correct answer using the code given below :

2, 3 and 4. ***2, 3 and 4*** - **Serum albumin**, **serum bilirubin**, and the presence of **ascites** are all key components of scoring systems like the **Child-Pugh score**, which is widely used to assess the severity and prognosis of **liver disease** and **portal hypertension** [1]. - **Low albumin** reflects impaired synthetic function, **high bilirubin** indicates impaired excretory function, and **ascites** points to decompensation, all contributing to a worse prognosis [2]. *3 and 4 only* - This option is incomplete as it correctly identifies **serum bilirubin** and **ascites**, but omits **serum albumin**, which is a crucial prognostic indicator reflecting the liver's synthetic capacity. - While bilirubin and ascites are important, excluding albumin underestimates the complexity of prognostic assessment in **portal hypertension**. *1, 2 and 3* - This option incorrectly includes **serum globulin** as a direct prognostic indicator in the context of standard scoring systems like Child-Pugh which focus on liver function and clinical complications. - While **globulins** can be elevated in chronic liver disease due to inflammation, they are not part of the primary prognostic criteria for **portal hypertension**. *1 and 4 only* - This option incorrectly includes **serum globulin** and excludes **serum albumin** and **serum bilirubin**, two critical markers of liver function. - Relying solely on globulin and ascites would provide an incomplete and inaccurate assessment of prognosis in a patient with **portal hypertension**.

Q: In endoscopic retrograde cholangiopancreatography endoscope used is:

Side viewing. ***Side viewing*** - **Side-viewing endoscopes** are specifically designed for ERCP, allowing the endoscopist to visualize the **ampulla of Vater** en face for precise cannulation [1]. - The side-viewing optic facilitates the passage of accessories like **catheters, guidewires**, and **sphincterotomes** into the bile and pancreatic ducts [1]. *End viewing* - **End-viewing endoscopes** (like standard gastroscopes or colonoscopes) have the camera directly at the tip, providing a straight-ahead view. - This design makes cannulation of the **ampulla of Vater** challenging, as it would be viewed tangentially, not directly. *Front viewing* - This term is synonymous with **end-viewing** and describes the typical orientation of standard gastrointestinal endoscopes. - While suitable for examining the lumen of organs, it lacks the specialized optics needed for the complex angulation and cannulation required in **ERCP**. *Rigid* - **Rigid endoscopes** are generally used for procedures where flexibility is not required, such as laparoscopy or cystoscopy [2]. - They are unsuitable for **ERCP**, which requires a highly flexible instrument to navigate the esophagus, stomach, duodenum, and access the **ampulla of Vater**.

Q: A 55 year old gentleman presented with history of right upper quadrant discomfort, jaundice, pruritis, fever, fatigue and weight loss. His serum bilirubin and alkaline phosphatase levels are raised and he also gives history of treatment for inflammatory bowel disease. He is most likely to be suffering from:

Primary sclerosing cholangitis. Primary sclerosing cholangitis - The presentation of jaundice, pruritus, RUQ discomfort, elevated bilirubin, and alkaline phosphatase in a patient with a history of inflammatory bowel disease (IBD) is highly suggestive of primary sclerosing cholangitis (PSC) [1], [2]. - PSC is a chronic cholestatic liver disease characterized by inflammation and fibrosis of the intrahepatic and/or extrahepatic bile ducts, often leading to strictures and ultimately cirrhosis and liver failure [2]. Benign bile duct stricture with cholangitis - While a benign stricture could cause some of these symptoms, the strong association with inflammatory bowel disease makes PSC a more probable diagnosis [2]. - Cholangitis alone does not fully explain the progressive nature and chronic cholestatic picture often seen with PSC. Biliary worms - Biliary parasites (e.g., Clonorchis sinensis, Ascaris lumbricoides) can cause cholangitis and obstruct bile ducts, leading to jaundice and elevated LFTs. - However, they are typically found in endemic areas and are not directly associated with inflammatory bowel disease. Bile duct malignancy - Cholangiocarcinoma (bile duct cancer) can present with similar symptoms like jaundice, weight loss, and RUQ discomfort. - Although IBD, particularly ulcerative colitis, is a risk factor for cholangiocarcinoma, PSC itself is a major risk factor for cholangiocarcinoma and fits the overall clinical picture better as the primary diagnosis given the long-standing symptoms and the strong association with IBD [2].

Question 1

Which of the following is the LEAST invasive initial treatment option for achalasia?

1. Botulinum toxin
2. Beta blockers
3. Pneumatic dilation
4. Heller's myotomy

Accepted Answer

2. Beta blockers

Answer

3. Pneumatic dilation

Answer

4. Heller's myotomy

Answer

1. Botulinum toxin

Question 2

The 'gold standard' for the diagnosis of GORD (Gastro-Oesophageal Reflux Disease) is

Accepted Answer

24-hour pH recording

Answer

upper GI endoscopy

Answer

CT scan

Answer

barium meal follow through

Question 3

Motility disorders of the oesophagus are best diagnosed by

Accepted Answer

Manometry

Answer

Barium meal

Answer

Endoscopy

Answer

Radiography

Question 4

Consider the following prognostic parameters of acute pancreatitis :

1. Rise in blood urea nitrogen over 5 mg/dl
2. Hematocrit decrease over 10%
3. Base deficit more than 4 mmol/L
4. Blood glucose over 10 mmol/L Which of the above parameters are important during initial 48 hours ?

Accepted Answer

1 and 2 only

Answer

2 and 3 only

Answer

1, 2 and 3

Answer

1, 3 and 4

Question 5

To differentiate pancreatic ascites from ascites secondary to cirrhosis of the liver, the most important test is :

Accepted Answer

Abdominal paracentesis

Answer

Abdominal ultrasound

Answer

Endoscopic retrograde cholangio pancreatography (ERCP)

Answer

Computed tomogram (CT) scan

Question 6

Factors important in the formation of gall stones include all of the following except :

Accepted Answer

Gall bladder motility

Answer

Obesity

Answer

The size of micelles

Answer

Cholesterol saturation in bile

Question 7

Which of the following is not associated with Acute Food Poisoning?

Accepted Answer

Tenesmus

Answer

High skin surface temperature

Answer

Onset with vomiting

Answer

Leucocytosis

Question 8

The prognostic indicators in a case of portal hypertension include:

1. Serum globulin
2. Serum albumin
3. Serum bilirubin
4. Ascites

Select the correct answer using the code given below :

Accepted Answer

2, 3 and 4

Answer

3 and 4 only

Answer

1, 2 and 3

Answer

1 and 4 only

Question 9

In endoscopic retrograde cholangiopancreatography endoscope used is:

Accepted Answer

Side viewing

Answer

End viewing

Answer

Front viewing

Answer

Rigid

Question 10

A 55 year old gentleman presented with history of right upper quadrant discomfort, jaundice, pruritis, fever, fatigue and weight loss. His serum bilirubin and alkaline phosphatase levels are raised and he also gives history of treatment for inflammatory bowel disease. He is most likely to be suffering from:

Accepted Answer

Primary sclerosing cholangitis

Answer

Benign bile duct stricture with cholangitis

Answer

Biliary worms

Answer

Bile duct malignancy

Gastroenterology — MCQs

Gastroenterology — MCQs

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