Gastrointestinal Surgery — MCQs

Gastrointestinal Surgery Indian Medical PG Practice Questions and MCQs

Question 1071: In a patient with acute diverticulitis confirmed by CT, what is the most common complication that may necessitate surgery?

A. Hemorrhage
B. Abscess formation
C. Fistula
D. Perforation (Correct Answer)

Explanation: ***Perforation*** - **Perforation** is the most common complication of acute diverticulitis that necessitates emergency surgery, occurring in 15-25% of hospitalized patients with acute diverticulitis - Free perforation leads to **generalized peritonitis**, which is a life-threatening condition requiring urgent surgical intervention (Hartmann's procedure or primary resection) - Even contained perforation may require surgical intervention if not responsive to conservative management - This is the **primary indication for emergency surgery** in acute diverticulitis *Abscess formation* - **Abscess formation** occurs in 15-20% of acute diverticulitis cases and is indeed a common complication - However, many abscesses (especially those <4-5 cm) are successfully managed **non-operatively** with IV antibiotics - Larger abscesses can often be treated with **percutaneous drainage** followed by elective surgery - While some abscesses require surgery, they are often managed conservatively initially, making perforation the more common surgical indication *Hemorrhage* - **Hemorrhage** from diverticula causes significant lower GI bleeding but typically occurs **separate from acute diverticulitis** - Diverticular bleeding usually stops spontaneously in 70-80% of cases - When surgery is needed for bleeding, it's usually in the setting of diverticulosis, not acute inflammatory diverticulitis - Not a common complication requiring surgery during acute diverticulitis episodes *Fistula* - **Fistula formation** is a **chronic complication** of recurrent diverticulitis, not an acute presentation - Results from chronic inflammation eroding into adjacent organs (colovesical, colovaginal, coloenteric fistulas) - Requires elective surgery but is not an acute complication necessitating emergency intervention - Much less common than perforation or abscess formation

Question 1072: During a laparotomy, which finding would indicate the presence of a Meckel's diverticulum?

A. A pouch on the anti-mesenteric border of the ileum (Correct Answer)
B. Inflammation of the ileocecal valve
C. A pouch on the mesenteric border of the jejunum
D. Inflammation at the sigmoid colon

Explanation: ***A pouch on the anti-mesenteric border of the ileum*** - A **Meckel's diverticulum** is a true diverticulum, a persistent remnant of the **vitelline duct**, typically located on the **anti-mesenteric border** of the distal ileum. - It usually occurs within **100 cm of the ileocecal valve** and contains all layers of the intestinal wall. *Inflammation of the ileocecal valve* - **Ileocecal valve inflammation** is seen in conditions like **Crohn's disease** (ileitis) or appendicitis, not a defining characteristic of Meckel's diverticulum. - While Meckel's diverticulum can cause inflammation, it would be within the diverticulum itself or cause obstruction, not primarily the ileocecal valve. *A pouch on the mesenteric border of the jejunum* - Diverticula located on the **mesenteric border** of the jejunum are typically acquired **false diverticula**, such as those seen in **jejunal diverticulosis**. - **Meckel's diverticulum** is always found in the ileum and on the **anti-mesenteric side**. *Inflammation at the sigmoid colon* - **Sigmoid colon inflammation** is indicative of conditions such as **diverticulitis** of the sigmoid colon or **ulcerative colitis**, which are unrelated to Meckel's diverticulum. - Meckel's diverticulum is a congenital anomaly of the **small intestine** and does not directly affect the sigmoid colon.

Question 1073: In patients with acute pancreatitis, what is the indication for performing an endoscopic retrograde cholangiopancreatography (ERCP)?

A. Presence of gallstones in the common bile duct (Correct Answer)
B. Elevated serum lipase levels
C. Necrosis of more than 30% of the pancreas
D. Pancreatic pseudocyst larger than 6 cm

Explanation: ***Presence of gallstones in the common bile duct*** - ERCP is indicated in **acute pancreatitis** when there is evidence of **choledocholithiasis** (gallstones in the common bile duct) causing biliary obstruction, especially if accompanied by **cholangitis**. - Its therapeutic role involves **removing obstructing stones** and potentially performing **sphincterotomy** to relieve pressure and prevent further pancreatic insults. *Elevated serum lipase levels* - **Elevated serum lipase** is a primary **diagnostic criterion for acute pancreatitis** itself but does not, by itself, indicate the need for ERCP. - While lipase levels are crucial for diagnosis, they do not provide information about the **etiology or specific bile duct obstruction** that would warrant an immediate ERCP. *Necrosis of more than 30% of the pancreas* - Pancreatic necrosis is a complication of severe pancreatitis, and its extent is typically assessed by **cross-sectional imaging** (e.g., CT scan) rather than ERCP. - ERCP is not primarily a diagnostic tool for **pancreatic necrosis** and is generally avoided in the acute phase of necrotic pancreatitis due to the risk of exacerbating inflammation or infection, unless there is a concomitant **biliary obstruction or cholangitis**. *Pancreatic pseudocyst larger than 6 cm* - A **pancreatic pseudocyst** is a fluid collection complication that may develop after acute pancreatitis. While large or symptomatic pseudocysts may require drainage, this is typically done via **endoscopic ultrasound-guided drainage** or **surgical intervention**, not usually immediate ERCP unless there's a specific need to access the pancreatic duct for other reasons (e.g., duct obliteration). - ERCP is mostly used for pseudocysts in cases where there is **ductal communication** or to rule out **main pancreatic duct disruption**, not solely based on size.

Question 1074: A 50-year-old woman with rheumatoid arthritis presents with a 2-day history of right upper quadrant pain and fever. An ultrasound shows gallstones and a thickened gallbladder wall. What is the diagnosis?

A. Acute cholecystitis (Correct Answer)
B. Chronic cholecystitis
C. Cholangitis
D. Hepatic abscess

Explanation: ***Acute cholecystitis*** - The patient presents with **right upper quadrant pain**, **fever**, and ultrasound findings of **gallstones** and a **thickened gallbladder wall**, which are classic diagnostic criteria for acute cholecystitis. - The patient's underlying rheumatoid arthritis is a comorbidity but does not directly explain these acute gallbladder symptoms. *Chronic cholecystitis* - This condition involves recurrent episodes of gallbladder inflammation, typically presenting with less severe and more intermittent symptoms over a longer period. - The sudden onset of **fever** and acute pain (2-day history) is more indicative of **acute inflammation** rather than chronic. *Cholangitis* - Cholangitis is an infection of the **biliary tree**, often presenting with **Charcot's triad** (fever, right upper quadrant pain, jaundice) or Reynold's pentad. - While fever and RUQ pain are present, the ultrasound findings specifically pointing to gallbladder inflammation (thickened wall) and gallstones make **cholecystitis** more likely, rather than general bile duct inflammation. *Hepatic abscess* - A hepatic abscess is a localized collection of pus in the liver, which can cause fever and RUQ pain. - However, the ultrasound findings of **gallstones** and a **thickened gallbladder wall** directly point to a gallbladder pathology, making an abscess less likely as the primary diagnosis without other specific imaging findings.

Question 1075: What is the first-line treatment for a patient diagnosed with acute diverticulitis without complications?

A. Antibiotics (Correct Answer)
B. Immediate surgery
C. Probiotics
D. Dietary modification

Explanation: ***Antibiotics*** - For **uncomplicated acute diverticulitis**, antibiotics covering common enteric bacteria (e.g., gram-negative rods and anaerobes) have traditionally been the first-line treatment. - This approach aims to reduce inflammation and prevent progression to complications like abscess formation or perforation. - **Note:** Recent evidence (AVOD, DIABOLO trials) suggests selective antibiotic use in truly uncomplicated cases, but antibiotics remain standard in most protocols, especially with fever, leukocytosis, or comorbidities. *Immediate surgery* - **Immediate surgery** is generally reserved for **complicated diverticulitis**, such as perforation with peritonitis, large abscess (>4cm), fistula, or obstruction. - It is not indicated for uncomplicated cases as a first-line treatment. - Elective surgery may be considered after recurrent episodes. *Probiotics* - While probiotics may have a role in gut health maintenance, there is **insufficient evidence** to support their use as a primary treatment for acute diverticulitis. - They are not a substitute for antibiotics or supportive care in managing the acute inflammatory process. *Dietary modification* - **Dietary modification** (clear liquids or low-residue diet during acute flare-ups, followed by high-fiber diet for prevention) is an important **supportive measure** and plays a role in management. - However, in the context of traditional teaching and most examination standards, antibiotics are considered the primary therapeutic intervention for acute inflammation, with dietary changes serving as adjunctive therapy. - Modern evidence supports conservative management with dietary modification alone in select uncomplicated cases.

Question 1076: A 45-year-old male with a history of peptic ulcer disease presents with severe abdominal pain, hypotension, and tachycardia. What is the most likely diagnosis?

A. Acute pancreatitis
B. Perforated peptic ulcer (Correct Answer)
C. Cholecystitis
D. Gastric outlet obstruction

Explanation: ***Perforated peptic ulcer*** - A history of **peptic ulcer disease** combined with **severe abdominal pain**, **hypotension**, and **tachycardia** strongly indicates a perforated ulcer and subsequent **peritonitis**. - This is a surgical emergency where gastric contents leak into the peritoneal cavity, causing a systemic inflammatory response. *Acute pancreatitis* - While it causes **severe abdominal pain**, it typically presents with pain radiating to the **back** and is often associated with elevated **amylase** and **lipase**. Hypotension and tachycardia are later signs. - History of peptic ulcer disease is not a direct risk factor for acute pancreatitis, though both can cause abdominal pain. *Cholecystitis* - Characterized by **right upper quadrant pain**, often radiating to the **right shoulder**, and is associated with **gallstones**. Fever and leukocytosis are common, but severe hemodynamic instability is less typical initially. - The patient's history of peptic ulcer disease and diffuse severe pain makes cholecystitis less likely. *Gastric outlet obstruction* - Presents with **postprandial vomiting**, **early satiety**, and weight loss, not acute severe pain and shock. - This is a chronic condition, and acute hemodynamic instability like hypotension and tachycardia are not typical features.

Question 1077: In a patient with esophageal cancer and dysphagia affecting liquid intake, what is the most appropriate intervention to ensure nutritional support?

A. Total parenteral nutrition
B. Nasogastric tube feeding
C. Esophageal stent placement
D. Placement of a percutaneous endoscopic gastrostomy tube (Correct Answer)

Explanation: ***Placement of a percutaneous endoscopic gastrostomy tube*** - The question tests the principle that **gastrostomy tube feeding offers long-term nutritional support** for patients with esophageal obstruction and **dysphagia**, ensuring adequate caloric intake directly into the stomach. - Gastrostomy tubes are preferred over nasogastric tubes for **long-term feeding** (>4-6 weeks) due to better patient comfort, reduced risk of aspiration, and ease of care. - **Clinical Note:** In severe esophageal obstruction, a true PEG (percutaneous endoscopic gastrostomy) may not be technically feasible due to inability to pass the endoscope. In such cases, **radiologically inserted gastrostomy (RIG)** or **surgical gastrostomy** would be performed instead, but the principle of enteral feeding via gastrostomy remains the same. - The **functioning gastrointestinal tract** should always be utilized when possible (enteral feeding preferred over parenteral). *Total parenteral nutrition* - **TPN is reserved for patients with non-functional gastrointestinal tracts** or those who cannot tolerate enteral feeding, which is not applicable here as the stomach and intestines remain functional. - It carries **higher risks of infection, hepatic complications, metabolic derangements**, and is significantly more expensive compared to enteral feeding. - Following the principle: **"If the gut works, use it"** - enteral nutrition is always preferred when feasible. *Nasogastric tube feeding* - **Nasogastric tubes cannot be passed through an obstructing esophageal tumor** and are typically only suitable for short-term feeding (less than 4-6 weeks). - They are uncomfortable for patients and pose a **higher risk of aspiration pneumonia**. - Not appropriate for long-term nutritional support in malignancy. *Esophageal stent placement* - Esophageal stents are **palliative interventions primarily used to alleviate dysphagia** and restore oral intake in malignant obstruction. - While stents may allow some oral nutrition, they **do not guarantee adequate or reliable nutritional support**, especially as disease progresses. - Stents can lead to complications such as **tumor overgrowth, stent migration, fistula formation, or chest pain**, which may further compromise nutritional intake. - When the primary goal is **ensuring adequate nutritional support** rather than just relieving dysphagia, a feeding gastrostomy is more reliable.

Question 1078: Which of the following is the most appropriate initial step in managing a patient with a suspected bowel obstruction?

A. Nasogastric tube insertion and fluid resuscitation as initial management (Correct Answer)
B. Immediate surgical intervention
C. Administer a laxative for bowel movement
D. Plan for elective surgery

Explanation: ***Correct: Nasogastric tube insertion and fluid resuscitation as initial management*** - **Nasogastric tube insertion** helps decompress the bowel, alleviating symptoms like nausea, vomiting, and abdominal distension in patients with suspected **bowel obstruction**. - **Fluid resuscitation** is crucial to correct dehydration and electrolyte imbalances, which are common secondary to vomiting and third-spacing of fluid into the bowel lumen. - This follows the "drip and suck" principle of initial bowel obstruction management: IV fluids (drip) and NG decompression (suck). - Patient stabilization should occur before definitive surgical planning. *Incorrect: Immediate surgical intervention* - While surgery is often ultimately required for bowel obstruction, immediate surgical intervention without prior stabilization can be high-risk, especially if the patient is dehydrated or has significant electrolyte disturbances. - Initial management focuses on patient stabilization, bowel decompression, and diagnostic imaging before definitive surgical decision-making. *Incorrect: Administer a laxative for bowel movement* - Administering a laxative is **contraindicated** in suspected bowel obstruction, as it can worsen symptoms and potentially lead to bowel perforation by increasing intraluminal pressure proximal to the obstruction. - Laxatives are used to promote bowel movements in constipation, not in mechanical obstruction. *Incorrect: Plan for elective surgery* - Bowel obstruction is typically an **acute condition** requiring urgent rather than elective management due to the risk of ischemia, perforation, and sepsis. - Elective surgery implies a scheduled procedure that can be postponed, which is inappropriate for the time-sensitive nature of bowel obstruction.

Question 1079: A 40-year-old male presents with a mass in the groin that becomes more prominent when standing and disappears when lying down. What is the most likely diagnosis?

A. Inguinal hernia (Correct Answer)
B. Femoral hernia
C. Testicular torsion
D. Hydrocele

Explanation: ***Inguinal hernia*** - The classic presentation of a **groin mass** that becomes more prominent with **standing** and reduces or disappears when **lying down** is highly characteristic of an inguinal hernia. - This behavior is due to the **protrusion of abdominal contents** through a weakness in the abdominal wall, which is more evident with increased intra-abdominal pressure. *Femoral hernia* - While also a groin hernia, **femoral hernias** typically present as a mass inferior to the **inguinal ligament** and medial to the **femoral vessels**. - They are more common in **women** and have a higher risk of **strangulation**, but the described positional changes are more typical of inguinal hernias. *Testicular torsion* - **Testicular torsion** involves the twisting of the spermatic cord, leading to acute **scrotal pain**, **swelling**, and often **nausea/vomiting**. - It is an **acute surgical emergency** and does not present as a gradual, reducible groin mass that changes with position. *Hydrocele* - A **hydrocele** is a collection of fluid around the testis within the **tunica vaginalis**, causing **scrotal swelling**. - It is typically **transilluminable** and does not usually reduce or disappear with position changes, nor does it typically present as a mass in the groin.

Question 1080: What is the appropriate management for a 45-year-old patient with symptomatic gallstones confirmed by ultrasound?

A. Medical therapy with oral bile acids.
B. Surgical removal of the gallbladder using laparoscopy. (Correct Answer)
C. Endoscopic procedure for bile duct stones.
D. Non-surgical management with observation and diet changes.

Explanation: ***Surgical removal of the gallbladder using laparoscopy*** - For **symptomatic gallstones**, **laparoscopic cholecystectomy** is the gold standard treatment, providing definitive relief from symptoms and preventing complications. - Minimally invasive approach offers benefits like **reduced pain**, shorter hospital stays, and quicker recovery compared to open surgery. *Medical therapy with oral bile acids* - **Oral bile acids** (e.g., **ursodeoxycholic acid**) are used for **dissolving small, cholesterol-rich gallstones** in patients who are not surgical candidates or prefer not to undergo surgery. - This therapy is typically **less effective** and much slower than surgery, suitable only for selected patients, and has a high recurrence rate of gallstones once treatment stops. *Endoscopic procedure for bile duct stones* - An **endoscopic procedure**, specifically **ERCP (Endoscopic Retrograde Cholangiopancreatography)**, is primarily indicated for **common bile duct stones** causing **cholangitis** or **pancreatitis**, not for symptomatic gallstones within the gallbladder itself. - While gallstones can migrate to the bile duct, the initial management of symptomatic gallbladder stones is **cholecystectomy**. *Non-surgical management with observation and diet changes* - **Observation and diet changes** are generally recommended for **asymptomatic gallstones** or for managing symptoms in patients who are not surgical candidates or decline surgery. - For **symptomatic gallstones**, this approach does not address the underlying problem and carries a risk of recurrent pain and potential complications like **cholecystitis** or **pancreatitis**.

Practice by Chapter

Esophageal Disorders

Practice Questions

Gastric Disorders

Practice Questions

Small Intestine Pathology

Practice Questions

Appendicitis

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Inflammatory Bowel Disease

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Intestinal Obstruction

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Gastrointestinal Bleeding

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Diverticular Disease

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Anorectal Disorders

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Colorectal Neoplasms

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Gastrointestinal Stomas

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Bariatric Surgery Principles

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