Pancreatic Surgery — MCQs

A 61-year-old alcoholic man presents with severe epigastric pain radiating to his back, elevated amylase and lipase, and a diagnosis of acute pancreatitis. Over the first 48 hours, he met 6 Ranson's criteria, including a PaO2 less than 60 mm Hg. His chest x-ray reveals bilateral pulmonary infiltrates, and his wedge pressure is low. Which of the following criteria must be met to make a diagnosis of adult respiratory distress syndrome (ARDS)?

Q56Easy

Which of the following substances is NOT secreted by a pancreatic tumor?

Q57Medium

Pancreatic cholera is characterized by all except:

Q58Medium

The most common hormone other than gastrin, contained in a gastrin-secreting islet cell tumor is:

Q59Easy

What is the most common complication of acute and chronic pancreatitis?

Q60Easy

A patient who has undergone a total pancreatectomy might be expected to develop which of the following complications?

Pancreatic Surgery Indian Medical PG Practice Questions and MCQs

Question 51: Which of the following is NOT a poor prognostic sign for pancreatitis?

A. TLC > 16,000/mm3
B. Calcium < 8 mmol/dL
C. BUN elevation > 5 mg/dL
D. Base deficit < 4 mEq/L (Correct Answer)

Explanation: This question tests your knowledge of the **Ranson Criteria**, a classic scoring system used to predict the severity and prognosis of acute pancreatitis. ### **Explanation of the Correct Option** **D. Base deficit < 4 mEq/L** is the correct answer because it does not meet the threshold for a poor prognosis. According to Ranson’s criteria (measured at 48 hours), a **base deficit > 4 mEq/L** (meaning a more negative value, indicating metabolic acidosis) is a sign of severe pancreatitis. A deficit of less than 4 is considered a relatively stable finding. ### **Analysis of Incorrect Options** The other options are established indicators of poor prognosis as per Ranson’s Criteria: * **A. TLC > 16,000/mm³:** This is one of the five criteria assessed **at admission** (GAWOT). High leukocytosis indicates a significant systemic inflammatory response. * **B. Calcium < 8 mg/dL:** Measured **at 48 hours**, hypocalcemia occurs due to saponification of fat in the retroperitoneum and is a marker of severe disease. (Note: The option says mmol/dL, but in clinical exams, this is a common typo for mg/dL). * **C. BUN elevation > 5 mg/dL:** An increase in BUN **at 48 hours** despite fluid resuscitation suggests worsening renal perfusion or ongoing third-spacing, signaling a poor prognosis. ### **High-Yield Clinical Pearls for NEET-PG** To master Ranson’s Criteria, remember the mnemonics: 1. **At Admission (GAWOT):** **G**lucose (>200), **A**ge (>55), **W**BC (>16k), **A**ST (>250), **L**DH (>350). 2. **At 48 Hours (C HOBBS):** **C**alcium (<8), **H**ematocrit drop (>10%), **O**xygen/PaO2 (<60), **B**UN increase (>5), **B**ase deficit (>4), **S**equestration of fluid (>6L). * **Score Interpretation:** 0-2 (1% mortality), 3-4 (15%), 5-6 (40%), >6 (100%). * **Modern Trend:** While Ranson is high-yield for exams, **APACHE II** is the most accurate (but complex) score, and **BISAP** is the preferred bedside tool in modern practice.

Question 52: Acute pancreatitis is a known complication of which of the following investigations?

A. ERCP (Correct Answer)
B. MRCP
C. CECT abdomen
D. Percutaneous transhepatic Cholangiography

Explanation: **Explanation:** **ERCP (Endoscopic Retrograde Cholangiopancreatography)** is an invasive procedure that involves cannulating the Ampulla of Vater and injecting contrast into the pancreatic and biliary ducts. **Post-ERCP Pancreatitis (PEP)** is the most common complication of this procedure, occurring in approximately 3–10% of cases. The underlying mechanism involves mechanical trauma to the papilla, hydrostatic pressure from contrast injection, or chemical/allergic reactions to the dye, all of which can trigger premature activation of pancreatic enzymes. **Analysis of Incorrect Options:** * **MRCP (Magnetic Resonance Cholangiopancreatography):** This is a non-invasive MRI technique that uses the body’s natural fluids (bile and pancreatic juice) as contrast. Since no instrumentation or exogenous dye is injected into the ducts, it does not cause pancreatitis. * **CECT Abdomen:** While intravenous contrast can rarely cause nephrotoxicity or allergic reactions, it does not involve the pancreatic ductal system and is not a cause of acute pancreatitis. In fact, CECT is the gold standard for diagnosing complications of pancreatitis. * **PTC (Percutaneous Transhepatic Cholangiography):** This involves entering the biliary tree through the liver. While it carries risks of bleeding, bile leak, or sepsis, it bypasses the pancreatic duct and is not typically associated with pancreatitis. **High-Yield Clinical Pearls for NEET-PG:** * **Risk Factors for PEP:** Female gender, young age, Sphincter of Oddi dysfunction, and difficult cannulation. * **Prevention:** Prophylactic **Rectal Indomethacin** or Diclofenac (NSAIDs) and temporary pancreatic duct stenting are proven to reduce the incidence of PEP. * **Diagnosis:** PEP is defined as new-onset upper abdominal pain with amylase levels >3 times the upper limit of normal, 24 hours after the procedure.

Question 53: In a pylorus-preserving pancreatoduodenectomy, which of the following structures is not resected?

A. Pyloric antrum (Correct Answer)
B. Common bile duct
C. Duodenum
D. None of the above

Explanation: **Explanation:** The **Pylorus-Preserving Pancreatoduodenectomy (PPPD)**, also known as the **Traverso-Longmire procedure**, is a modification of the standard Whipple’s procedure. The primary goal of this modification is to preserve the entire stomach, the pylorus, and approximately 2–3 cm of the first part of the duodenum to maintain normal gastric emptying physiology and reduce post-operative complications like "dumping syndrome." 1. **Why Option A is correct:** In a PPPD, the stomach is preserved in its entirety. The resection line occurs distal to the pylorus (at the proximal duodenum). Therefore, the **pyloric antrum** remains intact. 2. **Why Options B and C are incorrect:** Even in the pylorus-preserving variant, the "head" of the pancreas and its surrounding structures must be removed to ensure oncological clearance. This necessitates the resection of the **common bile duct** (to be anastomosed via hepaticojejunostomy) and the **distal duodenum** (along with the jejunum to be reconstructed). 3. **Why Option D is incorrect:** Since the pyloric antrum is explicitly preserved, "None of the above" is invalid. **High-Yield Clinical Pearls for NEET-PG:** * **Standard Whipple vs. PPPD:** The standard Whipple involves a **distal gastrectomy** (removing the antrum), whereas PPPD preserves it. * **Indications:** PPPD is preferred for benign or low-grade malignant tumors of the pancreatic head/periampullary region where there is no evidence of tumor infiltration into the duodenum or stomach. * **Complication:** The most common short-term complication specific to PPPD compared to standard Whipple is **Delayed Gastric Emptying (DGE)**, though long-term nutritional status is often better. * **Blood Supply:** In PPPD, the preservation of the **right gastric** and **right gastroepiploic arteries** is crucial for the viability of the pylorus.

Question 54: Which investigation is considered the gold standard for the detection of early pathologies in chronic pancreatitis, allowing for simultaneous treatment such as duct dilation or stent insertion?

A. MRI
B. ERCP (Correct Answer)
C. Pancreatic function tests
D. Fecal fat estimation

Explanation: **Explanation:** **ERCP (Endoscopic Retrograde Cholangiopancreatography)** is considered the gold standard for detecting early structural changes in the pancreatic ducts in chronic pancreatitis. While non-invasive imaging like MRCP has largely replaced it for purely diagnostic purposes, ERCP remains the definitive choice when **simultaneous therapeutic intervention** is required. It allows for the visualization of subtle ductal irregularities (the "chain of lakes" appearance) and provides the unique ability to perform interventions such as ductal dilation, stone extraction, or stent insertion to relieve obstruction. **Why other options are incorrect:** * **MRI/MRCP:** While excellent for visualizing ductal anatomy non-invasively, it is purely diagnostic and does not allow for simultaneous therapeutic procedures like stenting. * **Pancreatic Function Tests (e.g., Secretin-CCK test):** These are sensitive for detecting early functional impairment (exocrine insufficiency) but do not provide the anatomical detail or therapeutic capability required by the question. * **Fecal Fat Estimation:** This is a marker of malabsorption (steatorrhea) and only becomes positive when >90% of pancreatic function is lost. It is a late-stage finding and lacks anatomical specificity. **Clinical Pearls for NEET-PG:** * **Cambridge Classification:** Used to grade the severity of chronic pancreatitis based on ERCP findings. * **Investigation of Choice (IOC):** For chronic pancreatitis diagnosis, **CECT** is usually the initial investigation, while **MRCP** is the preferred non-invasive test for ductal anatomy. * **Most Sensitive Test:** The **Secretin Stimulation Test** is the most sensitive for early functional changes, but it is cumbersome and rarely performed clinically. * **Classic Triad:** Pancreatic calcification, steatorrhea, and diabetes mellitus (seen in advanced cases).

Question 55: A 61-year-old alcoholic man presents with severe epigastric pain radiating to his back, elevated amylase and lipase, and a diagnosis of acute pancreatitis. Over the first 48 hours, he met 6 Ranson's criteria, including a PaO2 less than 60 mm Hg. His chest x-ray reveals bilateral pulmonary infiltrates, and his wedge pressure is low. Which of the following criteria must be met to make a diagnosis of adult respiratory distress syndrome (ARDS)?

A. Hypoxemia defined as a PaO2 /FiO2 ratio of less than 200 (Correct Answer)
B. Hypoxemia defined as a PaO2 of less than 60 mm Hg
C. A pulmonary capillary wedge pressure greater than 18 mm Hg
D. Lack of improvement in oxygenation with administration of a test dose of furosemide

Explanation: **Explanation:** The diagnosis of **Acute Respiratory Distress Syndrome (ARDS)** in the context of severe acute pancreatitis is based on the **Berlin Definition** (which updated the older AECC criteria). ARDS is a form of non-cardiogenic pulmonary edema caused by increased alveolar-capillary permeability. **1. Why Option A is Correct:** The hallmark of ARDS is refractory hypoxemia. The severity is categorized by the **PaO2/FiO2 (P/F) ratio** (the ratio of arterial oxygen partial pressure to fractional inspired oxygen). According to the criteria: * **Mild ARDS:** P/F ratio 200–300 mmHg. * **Moderate ARDS:** P/F ratio 100–200 mmHg. * **Severe ARDS:** P/F ratio < 100 mmHg. A P/F ratio of **< 200** (Moderate to Severe) is a classic diagnostic threshold used in exams to define significant ARDS. **2. Why Other Options are Incorrect:** * **Option B:** While a PaO2 < 60 mmHg indicates hypoxemia, it does not account for the amount of supplemental oxygen (FiO2) being delivered. ARDS diagnosis specifically requires the ratio. * **Option C:** ARDS is **non-cardiogenic**. A Wedge Pressure > 18 mmHg suggests left atrial hypertension (heart failure). To diagnose ARDS, the wedge pressure must be **≤ 18 mmHg** (or there must be no clinical evidence of left heart failure). * **Option D:** Response to diuretics is not a formal diagnostic criterion, although ARDS typically does not resolve with diuretics alone as the fluid is inflammatory exudate, not simple hydrostatic transudate. **Clinical Pearls for NEET-PG:** * **Ranson’s Criteria:** A score of ≥ 3 indicates severe pancreatitis; this patient’s score of 6 predicts a mortality rate of ~50%. * **Pancreatitis & ARDS:** Phospholipase A2 release during pancreatitis damages alveolar surfactants, leading to ARDS. * **Radiology:** ARDS requires **bilateral opacities** on CXR/CT not fully explained by effusions or collapse. * **Management:** The mainstay is **Low Tidal Volume Ventilation** (6 mL/kg) to prevent volutrauma.

Question 56: Which of the following substances is NOT secreted by a pancreatic tumor?

A. VIP
B. Insulin
C. Somatostatin
D. ACTH (Correct Answer)

Explanation: ### Explanation The pancreas is a complex organ containing endocrine cells (Islets of Langerhans) that can give rise to various **Pancreatic Neuroendocrine Tumors (PanNETs)**. These tumors are classified based on the specific hormone they hypersecrete. **Why ACTH is the Correct Answer:** While the pancreas can produce a wide variety of hormones, **ACTH (Adrenocorticotropic Hormone)** is not a physiological product of pancreatic islet cells. ACTH is primarily secreted by the anterior pituitary gland. Although "Ectopic ACTH Syndrome" can occur in certain neuroendocrine tumors (like Small Cell Lung Cancer or Bronchial Carcinoids), it is not a standard or characteristic secretion of primary pancreatic tumors in the context of this classification. **Analysis of Incorrect Options:** * **A. VIP (Vasoactive Intestinal Peptide):** Secreted by **VIPomas**. This leads to **WDHA Syndrome** (Watery Diarrhea, Hypokalemia, and Achlorhydria), also known as Verner-Morrison syndrome. * **B. Insulin:** Secreted by **Insulinomas**, the most common functional PanNET. They present with Whipple’s Triad (symptoms of hypoglycemia, low blood glucose, and relief upon glucose administration). * **C. Somatostatin:** Secreted by **Somatostatinomas**. These rare tumors present with a "inhibitory syndrome" characterized by diabetes mellitus, cholelithiasis, and steatorrhea due to the universal inhibitory nature of somatostatin. **NEET-PG High-Yield Pearls:** * **Most common PanNET:** Insulinoma (usually benign). * **Most common malignant PanNET:** Gastrinoma (Zollinger-Ellison Syndrome). * **Glucagonoma:** Presents with **Necrolytic Migratory Erythema (NME)** and diabetes. * **MEN-1 Syndrome (Wermer’s):** Remember the 3 Ps—**P**ituitary, **P**arathyroid, and **P**ancreas (most commonly Gastrinomas).

Question 57: Pancreatic cholera is characterized by all except:

A. Hypochlorhydria
B. Hypokalemia
C. Glucose intolerance
D. Hypocalcemia (Correct Answer)

Explanation: **Explanation:** Pancreatic cholera, also known as **WDHA Syndrome** (Watery Diarrhea, Hypokalemia, Achlorhydria) or **Verner-Morrison Syndrome**, is caused by a **VIPoma**—a non-beta cell islet tumor of the pancreas that hypersecretes Vasoactive Intestinal Peptide (VIP). **Why Hypocalcemia is the Correct Answer:** Hypocalcemia is **not** a feature of pancreatic cholera. In fact, **Hypercalcemia** is frequently observed in these patients. This occurs for two reasons: VIP itself has a direct bone-resorbing effect, and VIPomas are often associated with **MEN-1 syndrome**, where co-existing hyperparathyroidism leads to elevated calcium levels. **Analysis of Incorrect Options:** * **Hypochlorhydria (A):** VIP inhibits gastric acid secretion by the parietal cells. This leads to achlorhydria or hypochlorhydria, distinguishing it from Zollinger-Ellison Syndrome (which has high acid). * **Hypokalemia (B):** Massive secretory diarrhea (often >3L/day) results in significant enteric loss of potassium, leading to profound muscle weakness and cardiac arrhythmias. * **Glucose Intolerance (C):** VIP promotes hepatic glycogenolysis, which can lead to hyperglycemia and impaired glucose tolerance in about 20-50% of patients. **NEET-PG High-Yield Pearls:** * **Classic Presentation:** "Tea-colored" watery diarrhea that persists even during fasting. * **Diagnosis:** Elevated fasting plasma VIP levels (>200 pg/mL). * **Localization:** Most VIPomas are located in the **tail of the pancreas**. * **Management:** Initial stabilization requires aggressive fluid/electrolyte replacement and **Octreotide** (somatostatin analogue) to inhibit VIP release. Surgical resection is the definitive treatment.

Question 58: The most common hormone other than gastrin, contained in a gastrin-secreting islet cell tumor is:

A. ACTH (Correct Answer)
B. Glucagon
C. Melanocyte stimulating hormone
D. Growth hormone releasing factor

Explanation: **Explanation:** **Gastrinomas** (Zollinger-Ellison Syndrome) are neuroendocrine tumors (NETs) that primarily secrete gastrin. However, these tumors are often plurihormonal, meaning they can synthesize and secrete multiple peptide hormones simultaneously. **Why ACTH is the correct answer:** Among the non-gastrin hormones produced by gastrin-secreting islet cell tumors, **ACTH (Adrenocorticotropic Hormone)** is the most common. When a gastrinoma secretes ACTH, it can lead to ectopic Cushing’s syndrome. This is particularly significant in malignant gastrinomas or those associated with **MEN-1 syndrome**. The presence of ACTH secretion is a poor prognostic indicator as it often signifies a more aggressive tumor biology. **Analysis of Incorrect Options:** * **B. Glucagon:** While glucagon is secreted by alpha-cell tumors (Glucagonomas), it is not the most common co-secreted hormone in a primary gastrinoma. * **C. Melanocyte Stimulating Hormone (MSH):** MSH can be elevated in states of high ACTH (due to shared precursor POMC), but it is not the primary hormone of interest in plurihormonal gastrinomas. * **D. Growth Hormone Releasing Factor (GHRF):** GHRF secretion is more typically associated with pancreatic NETs causing acromegaly (Somatotropinomas), but it is less frequent than ACTH in gastrinomas. **High-Yield Clinical Pearls for NEET-PG:** * **Passaro’s Triangle (Gastrinoma Triangle):** Boundaries are the junction of the cystic and common bile duct, the junction of the 2nd and 3rd parts of the duodenum, and the neck of the pancreas. 80-90% of gastrinomas are found here. * **MEN-1 Association:** Approximately 25% of gastrinomas occur as part of MEN-1 (3 Ps: Parathyroid, Pancreas, Pituitary). * **Most common site:** The **duodenum** is now recognized as the most common site for gastrinomas, especially in MEN-1 cases. * **Diagnosis:** Best initial test is fasting serum gastrin (>1000 pg/mL is diagnostic); the most sensitive provocative test is the **Secretin Stimulation Test**.

Question 59: What is the most common complication of acute and chronic pancreatitis?

A. Portal vein thrombosis
B. Pancreatic abscess
C. Pseudocyst (Correct Answer)
D. Pancreatic head mass

Explanation: **Explanation:** **Why Pseudocyst is the correct answer:** A pancreatic pseudocyst is a localized collection of fluid, rich in amylase and other pancreatic enzymes, surrounded by a wall of fibrous or granulation tissue (lacking an epithelial lining). It is the **most common complication** of both acute and chronic pancreatitis. * In **acute pancreatitis**, it typically occurs 4–6 weeks after the onset of an attack (acute peripancreatic fluid collection that fails to resolve). * In **chronic pancreatitis**, it occurs due to ductal obstruction or rupture. Approximately 10–25% of patients with chronic pancreatitis develop pseudocysts. **Why the other options are incorrect:** * **A. Portal vein thrombosis:** While it can occur due to local inflammation (especially in the splenic vein, leading to sinistral hypertension), it is much less frequent than pseudocyst formation. * **B. Pancreatic abscess:** Now clinically referred to as "infected walled-off necrosis" (WON), this is a serious but less common complication compared to the high incidence of sterile pseudocysts. * **D. Pancreatic head mass:** While chronic pancreatitis can present as an inflammatory mass in the head (mimicking malignancy), it is a specific morphological variant rather than the most common overall complication. **High-Yield Clinical Pearls for NEET-PG:** * **Definition:** Requires **>4 weeks** to form a mature wall. * **Location:** Most commonly found in the **lesser sac**. * **Management:** Most (up to 50%) resolve spontaneously. Intervention (Endoscopic cystogastrostomy or surgical drainage) is indicated only if the cyst is **symptomatic** (pain, gastric outlet obstruction) or **complicated** (infection, hemorrhage). * **Rule of 6s (Traditional):** Intervention was historically considered if the cyst was >6 cm or persisted for >6 weeks, though modern practice focuses more on symptoms.

Question 60: A patient who has undergone a total pancreatectomy might be expected to develop which of the following complications?

A. Diabetes mellitus (Correct Answer)
B. Hypercalcemia
C. Hyperphosphatemia
D. Constipation

Explanation: **Explanation:** **1. Why Diabetes Mellitus is Correct:** The pancreas is a dual-function organ with both exocrine and endocrine roles. The endocrine function is localized in the **Islets of Langerhans**, which contain **Beta cells** (secreting insulin) and **Alpha cells** (secreting glucagon). A total pancreatectomy results in the complete removal of these cells, leading to an absolute deficiency of insulin. This results in **"Pancreatogenic Diabetes" (Type 3c DM)**. Unlike Type 1 DM, these patients also lack glucagon, making them highly sensitive to insulin and prone to severe, "brittle" hypoglycemia. **2. Why Incorrect Options are Wrong:** * **Hypercalcemia:** Pancreatic surgery is more likely to cause *hypocalcemia* (especially in acute pancreatitis due to saponification). There is no physiological mechanism linking total pancreatectomy to elevated calcium levels. * **Hyperphosphatemia:** This is typically associated with renal failure or hypoparathyroidism, not pancreatic resection. * **Constipation:** Total pancreatectomy removes the source of digestive enzymes (lipase, amylase, proteases). This leads to **Exocrine Pancreatic Insufficiency (EPI)**, resulting in malabsorption and **steatorrhea** (foul-smelling, oily stools/diarrhea), rather than constipation. **3. Clinical Pearls for NEET-PG:** * **Post-Pancreatectomy Triad:** Steatorrhea (Exocrine loss), Diabetes (Endocrine loss), and Weight loss. * **Whipple’s Procedure (PD):** Removes the head of the pancreas; total pancreatectomy is reserved for diffuse tumors or IPMN. * **Management:** Patients require lifelong **Insulin** therapy and **PERT** (Pancreatic Enzyme Replacement Therapy). * **High-Yield Fact:** Post-total pancreatectomy diabetes is uniquely dangerous because the loss of Alpha cells eliminates the "counter-regulatory" response to hypoglycemia.

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

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