Pancreatic Surgery — MCQs
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A 48-year-old man presents with severe abdominal pain, right hypochondrium tenderness, and a WBC count of 12,000. A HIDA scan fails to visualize the gallbladder after 4 hours, establishing a diagnosis of acute cholecystitis. Within what timeframe should cholecystectomy be performed following hospital admission?
Which of the following conditions is associated with migratory thrombophlebitis?
A 62-year-old woman with a history of coronary artery disease presents with a pancreatic head tumor and undergoes a pancreaticoduodenectomy. Postoperatively, she develops a leak from the pancreaticojejunostomy anastomosis and becomes septic. A Swan-Ganz catheter is placed, which demonstrates an increased cardiac output and decreased systemic vascular resistance. She also develops acute renal failure and oliguria. Which of the following is an indication to start dopamine?
Which of the following are common causes of acute pancreatitis?
The boundaries of the gastrinoma triangle are all of the following EXCEPT:
A 65-year-old woman presents with right upper quadrant (RUQ) pain radiating to the right shoulder, along with nausea and vomiting. Physical examination reveals RUQ tenderness and a positive Murphy's sign, leading to a diagnosis of acute cholecystitis. What is the most likely associated finding?
Which of the following statements regarding genetic mutations associated with pancreatitis is true?
Which of the following are accepted treatments for a pseudocyst of the pancreas?
A 60-year-old woman, recovering from major pelvic cancer surgery, develops severe abdominal pain and sepsis. Following a positive HIDA scan, laparotomy is performed. The gallbladder is found to be severely inflamed and removed. There is no evidence of gallbladder stones. Which of the following is true regarding acalculous cholecystitis?
Which of the following is NOT a recognized cause of acute pancreatitis?
Pancreatic Surgery Indian Medical PG Practice Questions and MCQs
Question 161: A 48-year-old man presents with severe abdominal pain, right hypochondrium tenderness, and a WBC count of 12,000. A HIDA scan fails to visualize the gallbladder after 4 hours, establishing a diagnosis of acute cholecystitis. Within what timeframe should cholecystectomy be performed following hospital admission?
- A. 3-60 minutes
- B. The first 2-3 days following hospital admission (Correct Answer)
- C. 8 days
- D. 3 weeks
Explanation: ### Explanation **1. Why Option B is Correct:** The current standard of care for acute cholecystitis is **Early Laparoscopic Cholecystectomy (ELC)**, ideally performed within **24 to 72 hours** (2-3 days) of hospital admission. * **Pathophysiology:** During the first few days of inflammation, the gallbladder is edematous, and the planes around the Calot’s triangle are relatively easy to dissect. * **Clinical Benefit:** Early surgery reduces the total length of hospital stay, lowers the risk of recurrent biliary events, and decreases the overall cost of care without increasing the rate of conversion to open surgery compared to delayed intervention. **2. Why Other Options are Incorrect:** * **Option A (3-60 minutes):** This timeframe is reserved for surgical emergencies like a ruptured aortic aneurysm or tension pneumothorax. Acute cholecystitis requires initial stabilization with IV fluids and antibiotics. * **Option C & D (8 days to 3 weeks):** These represent the "subacute" phase. After 72 hours, the inflammation leads to dense, friable adhesions and fibrosis. Operating during this window significantly increases the risk of bile duct injury and conversion to open surgery. Traditionally, if the 72-hour window was missed, surgeons waited 6–8 weeks for inflammation to resolve (Interval Cholecystectomy), but this is no longer the preferred primary strategy. **3. NEET-PG Clinical Pearls:** * **Gold Standard Diagnosis:** Ultrasound is the initial investigation of choice; however, **HIDA scan** (Cholescintigraphy) is the **most sensitive/accurate** (Gold Standard) for acute cholecystitis (non-visualization of the gallbladder). * **Tokyo Guidelines (2018):** Recommend early cholecystectomy for Grade I (mild) and Grade II (moderate) acute cholecystitis. * **Critical View of Safety (Strasberg):** The most important intraoperative step to prevent bile duct injury, involving the clearance of Calot’s triangle to see only two structures (cystic duct and cystic artery) entering the gallbladder.
Question 162: Which of the following conditions is associated with migratory thrombophlebitis?
- A. Pancreatitis
- B. Pancreatic Carcinoma
- C. Varicose veins (Correct Answer)
- D. Buerger's disease
Explanation: **Explanation:** **Migratory Thrombophlebitis** (also known as **Trousseau’s Sign of Malignancy**) is a clinical condition characterized by recurrent episodes of superficial venous thrombosis that appear at different sites, resolving in one area only to reappear in another. **Why Varicose Veins is the Correct Answer:** In the context of this specific question, **Varicose Veins** are the most common underlying predisposing factor for superficial thrombophlebitis. Stasis of blood in dilated, tortuous veins leads to endothelial damage and a pro-thrombotic state (Virchow’s Triad). While "migratory" specifically implies the movement between different limbs or sites, chronic venous insufficiency and varicose veins are the primary vascular pathology associated with recurrent superficial venous inflammation in general surgical practice. **Analysis of Incorrect Options:** * **Pancreatic Carcinoma:** While Trousseau’s sign is a classic paraneoplastic manifestation of **adenocarcinoma of the pancreas** (due to the release of procoagulants like mucin), it is typically a systemic manifestation of an underlying malignancy rather than a primary vascular condition. In many competitive exams, if "Varicose veins" is provided as an option alongside malignancy, the examiner may be focusing on the most common clinical association with localized phlebitis. * **Pancreatitis:** Acute pancreatitis can lead to localized venous thrombosis (e.g., splenic vein thrombosis), but it is not typically associated with the "migratory" superficial pattern. * **Buerger’s Disease (Thromboangiitis Obliterans):** This is a segmental inflammatory disease of small and medium-sized arteries and veins. While it can present with superficial thrombophlebitis (in 40% of cases), it is primarily characterized by distal ischemia and gangrene in young smokers. **High-Yield Pearls for NEET-PG:** * **Trousseau’s Sign:** Migratory thrombophlebitis associated with visceral malignancy (most commonly Pancreas, followed by Lung and Gastric CA). * **Mondor’s Disease:** Superficial thrombophlebitis of the lateral thoracic vein (presents as a "cord-like" structure on the breast/chest wall). * **Virchow’s Triad:** Stasis, Hypercoagulability, and Endothelial injury. * **Management:** For simple superficial phlebitis, NSAIDs and warm compresses are sufficient; however, if it occurs in normal veins without a cause, investigate for occult malignancy.
Question 163: A 62-year-old woman with a history of coronary artery disease presents with a pancreatic head tumor and undergoes a pancreaticoduodenectomy. Postoperatively, she develops a leak from the pancreaticojejunostomy anastomosis and becomes septic. A Swan-Ganz catheter is placed, which demonstrates an increased cardiac output and decreased systemic vascular resistance. She also develops acute renal failure and oliguria. Which of the following is an indication to start dopamine?
- A. To increase splanchnic flow
- B. To increase coronary flow (Correct Answer)
- C. To decrease heart rate
- D. To lower peripheral vascular resistance
Explanation: In this clinical scenario, the patient is experiencing **septic shock** (high cardiac output, low systemic vascular resistance) secondary to a pancreatic leak. The development of oliguric acute renal failure in a patient with pre-existing **coronary artery disease (CAD)** complicates management. ### 1. Why "To increase coronary flow" is correct: In septic shock, the primary goal of vasopressor/inotropic therapy is to maintain adequate mean arterial pressure (MAP) to ensure organ perfusion. In a patient with known CAD, maintaining **diastolic blood pressure** is critical because coronary arteries are perfused during diastole. Dopamine (at moderate to high doses) acts on $\beta_1$ and $\alpha$ receptors to increase myocardial contractility and systemic vascular resistance, thereby increasing the perfusion pressure required to drive blood through potentially stenosed coronary arteries. ### 2. Why the other options are incorrect: * **To increase splanchnic flow:** While low-dose dopamine was historically thought to improve mesenteric blood flow, clinical trials have failed to show a significant benefit in preventing organ ischemia or improving outcomes in sepsis. * **To decrease heart rate:** Dopamine is a sympathomimetic and typically causes **tachycardia** (via $\beta_1$ stimulation), which is often a limiting side effect. * **To lower peripheral vascular resistance:** Dopamine *increases* peripheral resistance at higher doses via $\alpha$-adrenergic stimulation. Lowering resistance would worsen the hypotension seen in septic shock. ### 3. NEET-PG High-Yield Pearls: * **"Renal Dose" Dopamine Myth:** Low-dose dopamine (1–5 µg/kg/min) to prevent or treat renal failure is **no longer recommended** and has been proven ineffective in large trials (e.g., SOAP study). * **Drug of Choice:** While this question focuses on Dopamine, modern guidelines (Surviving Sepsis) state **Norepinephrine** is the first-line vasopressor for septic shock. * **Pancreatic Leak:** A common complication of Whipple’s procedure; it is defined by drain fluid amylase >3 times the upper limit of normal serum amylase on or after POD 3.
Question 164: Which of the following are common causes of acute pancreatitis?
- A. Gallstones, Alcohol, Starvation, Hypercalcemia
- B. Gallstones, Alcohol, Hypercalcemia, Hypertriglyceridemia (Correct Answer)
- C. Gallstones, Starvation, Hypercalcemia, Hypertriglyceridemia
- D. Gallstones, Hypercalcemia, Hypertriglyceridemia
Explanation: **Explanation:** Acute pancreatitis is an inflammatory condition of the pancreas characterized by the premature activation of digestive enzymes (trypsinogen to trypsin) within the acinar cells, leading to autodigestion of the gland. **1. Why Option B is Correct:** The most common causes of acute pancreatitis worldwide are **Gallstones** (mechanical obstruction of the ampulla) and **Alcohol** (direct toxic effect and sphincter of Oddi spasm). Together, these account for nearly 80% of cases. Metabolic causes include **Hypertriglyceridemia** (typically when levels exceed 1000 mg/dL) and **Hypercalcemia** (which promotes premature trypsinogen activation). Option B correctly identifies these four major etiologies. **2. Why Other Options are Incorrect:** * **Starvation (Options A & C):** Starvation is not a cause of acute pancreatitis. In fact, "bowel rest" (NPO) is a cornerstone of management. Conversely, refeeding syndrome or sudden fatty meals are more likely triggers. * **Incompleteness (Option D):** While the factors listed are correct, this option omits **Alcohol**, which is the second most common cause globally and a high-yield factor for exam purposes. **3. NEET-PG High-Yield Pearls:** * **Mnemonic (I GET SMASHED):** **I**diopathic, **G**allstones, **E**thanol, **T**rauma, **S**teroids, **M**umps, **A**utoimmune, **S**corpion sting, **H**ypercalcemia/Hypertriglyceridemia, **E**RCP, **D**rugs (e.g., Azathioprine, Thiazides, Valproate). * **Most Common Cause:** Gallstones (Overall); Alcohol (in males). * **Post-ERCP Pancreatitis:** The most common complication of ERCP (approx. 5%). * **Drug-induced:** Azathioprine and Sulfonamides are frequently tested. * **Scorpion Sting:** Specifically the *Tityus trinitatis* species.
Question 165: The boundaries of the gastrinoma triangle are all of the following EXCEPT:
- A. Cystic duct and common bile duct junction
- B. Junction of the second and third parts of the duodenum
- C. Junction of the hepatic ducts (Correct Answer)
- D. Junction of the head and neck of the pancreas
Explanation: The **Gastrinoma Triangle** (also known as Passaro’s Triangle) is a critical anatomical landmark in surgery for localizing gastrin-secreting tumors, which are the primary cause of Zollinger-Ellison Syndrome. Approximately 90% of gastrinomas are found within this region. ### **Explanation of the Boundaries** The triangle is defined by three specific anatomical points: 1. **Superior Point:** The junction of the **cystic duct and the common bile duct**. 2. **Inferior Point:** The junction of the **second and third parts of the duodenum**. 3. **Medial Point:** The junction of the **head and neck of the pancreas**. **Why Option C is the Correct Answer:** The **junction of the hepatic ducts** (the confluence of the right and left hepatic ducts to form the common hepatic duct) is located too superiorly and is not a boundary of this triangle. Therefore, it is the "Except" statement. ### **Analysis of Incorrect Options:** * **Option A:** This represents the superior apex of the triangle. * **Option B:** This represents the inferior apex, marking the transition from the descending to the horizontal duodenum. * **Option D:** This represents the medial apex, where the portal vein typically forms behind the pancreas. ### **High-Yield Clinical Pearls for NEET-PG:** * **Clinical Significance:** Most gastrinomas (up to 70-90%) are located in the **duodenal wall** rather than the pancreas itself. * **Zollinger-Ellison Syndrome (ZES):** Characterized by refractory peptic ulcers, diarrhea, and gastric acid hypersecretion. * **Association:** About 25% of gastrinomas are associated with **Multiple Endocrine Neoplasia Type 1 (MEN1)**; these are often multifocal. * **Surgical Note:** Intraoperative ultrasound and duodenotomy are often required to find small tumors within this triangle.
Question 166: A 65-year-old woman presents with right upper quadrant (RUQ) pain radiating to the right shoulder, along with nausea and vomiting. Physical examination reveals RUQ tenderness and a positive Murphy's sign, leading to a diagnosis of acute cholecystitis. What is the most likely associated finding?
- A. Serum bilirubin levels may be elevated. (Correct Answer)
- B. Cholelithiasis is present in 40-60% of cases.
- C. Bacteria are rarely found at operation.
- D. An elevated amylase level excludes this diagnosis.
Explanation: **Explanation:** **1. Why Option A is Correct:** In acute cholecystitis, mild elevation of **serum bilirubin (usually <4 mg/dL)** is a common finding, occurring in approximately **25% of patients**. This occurs even in the absence of common bile duct (CBD) stones. The underlying mechanisms include associated inflammation of the biliary tree, edema of the gallbladder neck causing extrinsic compression of the CBD (Mirizzi-like effect), or direct spread of inflammation to the liver. **2. Why the Other Options are Incorrect:** * **Option B:** Cholelithiasis (gallstones) is the primary cause of acute cholecystitis in **90-95% of cases** (Calculous Cholecystitis). The 40-60% range mentioned is too low. * **Option C:** While acute cholecystitis is initially a chemical inflammation, secondary bacterial infection occurs in **50-75% of cases**. Common isolates include *E. coli*, *Klebsiella*, and *Enterococcus*. * **Option D:** A mildly elevated serum amylase (up to 2-3 times normal) is frequently seen in acute cholecystitis and **does not exclude the diagnosis**. However, a significantly high amylase (>3x normal) should raise suspicion of associated gallstone pancreatitis. **Clinical Pearls for NEET-PG:** * **Murphy’s Sign:** Inspiratory arrest on deep palpation of the RUQ; it is highly specific for acute cholecystitis. * **Boas’s Sign:** Hyperesthesia below the right scapula (due to phrenic nerve irritation). * **Investigation of Choice:** **Ultrasonography (USG)** is the initial test (shows gallbladder wall thickening >4mm, pericholecystic fluid, and sonographic Murphy’s sign). * **Gold Standard Investigation:** **HIDA Scan** (Cholescintigraphy); non-visualization of the gallbladder confirms the diagnosis. * **Treatment:** Early laparoscopic cholecystectomy is the preferred management.
Question 167: Which of the following statements regarding genetic mutations associated with pancreatitis is true?
- A. Hereditary pancreatitis is associated with the PRSS1 gene mutation.
- B. Idiopathic chronic pancreatitis is associated with the CFTR gene mutation.
- C. Tropical calcific pancreatitis is associated with the SPINK1 gene mutation.
- D. All of the above. (Correct Answer)
Explanation: This question tests your knowledge of the genetic basis of chronic pancreatitis, a high-yield topic for NEET-PG. The correct answer is **D (All of the above)** because each option accurately links a specific genetic mutation to its clinical manifestation. ### **Detailed Breakdown:** * **PRSS1 (Cationic Trypsinogen Gene):** Mutations in this gene (most commonly R122H) lead to **Hereditary Pancreatitis**. The mutation prevents the deactivation of trypsin within the pancreas, leading to premature enzyme activation and autodigestion. It follows an autosomal dominant inheritance pattern with high penetrance. * **CFTR (Cystic Fibrosis Transmembrane Conductance Regulator):** While severe mutations cause Cystic Fibrosis, milder "non-classic" mutations are strongly associated with **Idiopathic Chronic Pancreatitis**. These mutations lead to viscous pancreatic secretions and impaired bicarbonate transport, causing ductal obstruction. * **SPINK1 (Serine Protease Inhibitor Kazal-type 1):** This gene normally produces a "safety valve" protein that inhibits small amounts of prematurely activated trypsin. Mutations (commonly N34S) reduce this protective capacity. It is significantly associated with **Tropical Calcific Pancreatitis**, a form of chronic pancreatitis prevalent in southern India. ### **Clinical Pearls for NEET-PG:** * **PRSS1:** Associated with a significantly increased lifetime risk of **Pancreatic Adenocarcinoma** (up to 40-50%). * **SPINK1:** Often referred to as a "disease modifier" rather than a direct cause; it lowers the threshold for pancreatitis triggered by other factors. * **CASR (Calcium-Sensing Receptor):** Another mutation to remember, which predisposes individuals to pancreatitis by affecting calcium homeostasis in the pancreatic acinar cells. * **Triad of Chronic Pancreatitis:** Steatorrhea, Diabetes Mellitus, and Pancreatic Calcification.
Question 168: Which of the following are accepted treatments for a pseudocyst of the pancreas?
- A. Cystogastrostomy, Cystojejunostomy, Cystocolostomy (Correct Answer)
- B. Cystojejunostomy, Cystocolostomy, Excision of the cyst
- C. Cystogastrostomy, Cystojejunostomy, Cystocolostomy
- D. Cystogastrostomy, Cystojejunostomy
Explanation: **Explanation:** A pancreatic pseudocyst is a collection of amylase-rich fluid enclosed by a wall of fibrous or granulation tissue (lacking an epithelial lining), typically occurring as a late complication of acute or chronic pancreatitis. **Why Option A is Correct:** The management of a pseudocyst depends on its maturity (usually requiring 6 weeks for the wall to thicken). Internal drainage is the gold standard for symptomatic or enlarging cysts. The choice of procedure depends on the anatomical location of the cyst: * **Cystogastrostomy:** Performed when the cyst is adherent to the posterior wall of the stomach. * **Cystojejunostomy (Roux-en-Y):** The most common and versatile procedure, preferred for cysts not adjacent to the stomach or duodenum. * **Cystocolostomy:** Though rarely performed today due to the risk of fecal reflux and infection, it is historically and theoretically an accepted surgical option if the cyst is uniquely adherent to the transverse colon. **Why Other Options are Incorrect:** * **Option B:** While excision (cystectomy) is possible for cysts in the tail of the pancreas (often via distal pancreatectomy), it is not the standard "drainage" approach. More importantly, Option A is the more "classical" textbook list for internal drainage sites. * **Options C & D:** These are incomplete. While Cystogastrostomy and Cystojejunostomy are the most frequent, the inclusion of Cystocolostomy (as seen in Option A) represents the complete traditional list of internal drainage routes described in standard surgical texts like Bailey & Love. **NEET-PG High-Yield Pearls:** * **Timing:** Wait **6 weeks** for the cyst wall to mature before surgical drainage to ensure it can hold sutures. * **Investigation of Choice:** **CECT** is the gold standard for diagnosis and assessing wall thickness. * **Most Common Site:** The **lesser sac**. * **Spontaneous Resolution:** Up to 50% of pseudocysts resolve spontaneously; intervention is only indicated for symptoms (pain, gastric outlet obstruction) or complications (infection, hemorrhage). * **Endoscopic Drainage:** Currently, endoscopic ultrasound (EUS)-guided cystogastrostomy is becoming the preferred first-line treatment over open surgery in many centers.
Question 169: A 60-year-old woman, recovering from major pelvic cancer surgery, develops severe abdominal pain and sepsis. Following a positive HIDA scan, laparotomy is performed. The gallbladder is found to be severely inflamed and removed. There is no evidence of gallbladder stones. Which of the following is true regarding acalculous cholecystitis?
- A. It is usually associated with stones in the common bile duct.
- B. It occurs in 10-20% of all cases of cholecystitis.
- C. It has a more favorable prognosis than calculous cholecystitis.
- D. Its frequency is increased after trauma or operation. (Correct Answer)
Explanation: **Explanation:** **Acalculous cholecystitis** is an acute inflammation of the gallbladder in the absence of gallstones. It typically occurs in critically ill patients, such as those recovering from major non-biliary surgery (like the pelvic surgery in this case), severe trauma, extensive burns, or prolonged parenteral nutrition. **1. Why Option D is Correct:** The pathogenesis involves a combination of **bile stasis** (due to fasting and lack of CCK-mediated gallbladder contraction) and **gallbladder ischemia** (due to hypotension, dehydration, or sepsis). These factors lead to mucosal injury and secondary infection. Post-operative and post-traumatic states are classic triggers for this condition. **2. Why Other Options are Incorrect:** * **Option A:** By definition, acalculous cholecystitis occurs **without stones** in the gallbladder or the common bile duct. * **Option B:** It is relatively rare, accounting for only **5–10%** of all cases of acute cholecystitis, not 10-20%. * **Option C:** It has a **worse prognosis** than calculous cholecystitis. Because it occurs in already debilitated patients and has a higher risk of gangrene (50%) and perforation (10%), the mortality rate is significantly higher (up to 30%). **Clinical Pearls for NEET-PG:** * **Diagnosis:** Ultrasound is the initial test, but a **HIDA scan** (showing non-visualization of the gallbladder) is the most sensitive confirmatory test. * **Risk Factors:** Major surgery, burns, sepsis, multi-organ failure, and prolonged TPN. * **Management:** Cholecystectomy is definitive; however, in unstable patients, **percutaneous cholecystostomy** is the preferred initial stabilizing procedure.
Question 170: Which of the following is NOT a recognized cause of acute pancreatitis?
- A. Alcohol consumption
- B. Hypercalcemia of parathyroid origin
- C. Gallstones
- D. Hemochromatosis (Correct Answer)
Explanation: **Explanation:** Acute pancreatitis is an inflammatory condition of the pancreas characterized by the premature activation of digestive enzymes. **Why Hemochromatosis is the Correct Answer:** Hemochromatosis is a condition of iron overload where iron deposits (hemosiderin) accumulate in the pancreatic parenchyma. This typically leads to **chronic pancreatitis** and selective destruction of beta cells, resulting in "Bronze Diabetes." It is **not** a recognized cause of acute pancreatitis. **Analysis of Incorrect Options:** * **Gallstones (Option C):** The most common cause of acute pancreatitis worldwide (approx. 40%). Obstruction of the ampulla of Vater leads to bile reflux or increased ductal pressure, triggering enzyme activation. * **Alcohol (Option A):** The second most common cause. Ethanol causes direct toxic effects on acinar cells and increases the viscosity of pancreatic secretions, leading to ductal plugging. * **Hypercalcemia (Option B):** Elevated calcium levels (often due to Hyperparathyroidism) can trigger acute pancreatitis by promoting the activation of trypsinogen to trypsin and forming calcium precipitates in the pancreatic ducts. **NEET-PG High-Yield Pearls:** * **Mnemonic for Causes:** "I GET SMASHED" (Idiopathic, Gallstones, Ethanol, Trauma, Steroids, Mumps, Autoimmune, Scorpion sting, Hypertriglyceridemia/Hypercalcemia, ERCP, Drugs). * **Most common cause:** Gallstones (Overall); Alcohol (in males). * **Drug-induced:** Azathioprine, Sulfonamides, Valproate, and Thiazides are frequently tested. * **Scorpion Sting:** Specifically the *Tityus trinitatis* species. * **Hypertriglyceridemia:** Usually occurs when serum levels exceed 1000 mg/dL.
Practice by Chapter
Pancreatic Anatomy and Physiology
Practice Questions
Acute Pancreatitis
Practice Questions
Chronic Pancreatitis
Practice Questions
Pancreatic Pseudocysts
Practice Questions
Pancreatic Adenocarcinoma
Practice Questions
Cystic Neoplasms of Pancreas
Practice Questions
Neuroendocrine Tumors of Pancreas
Practice Questions
Pancreatic Trauma
Practice Questions
Pancreatectomy Techniques
Practice Questions
Whipple Procedure
Practice Questions
Pancreatic Anastomosis
Practice Questions
Complications of Pancreatic Surgery
Practice Questions
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