Pancreatic Surgery — MCQs

Pancreatic Surgery Indian Medical PG Practice Questions and MCQs

Question 71: What is the medical treatment of acute pancreatitis?

A. Calcium (Correct Answer)
B. Glucagon
C. Aprotinin
D. Cholestyramine

Explanation: ### Explanation The medical management of acute pancreatitis primarily focuses on aggressive fluid resuscitation, pain control, and addressing metabolic derangements. **Why Calcium is the Correct Answer:** Hypocalcemia is a common and serious metabolic complication of acute pancreatitis, occurring due to **saponification** (the deposition of calcium soaps in areas of fat necrosis). Low serum calcium levels are a poor prognostic sign and are included in the **Ranson Criteria** (a fall in serum calcium <8 mg/dL within 48 hours). Therefore, intravenous **Calcium gluconate** is administered as part of the medical treatment to correct symptomatic hypocalcemia and prevent tetany or cardiac arrhythmias. **Analysis of Incorrect Options:** * **B. Glucagon:** While glucagon can inhibit pancreatic exocrine secretion, clinical trials have shown it has no significant benefit in improving the outcome or mortality of acute pancreatitis. * **C. Aprotinin:** This is an antifibrinolytic and enzyme inhibitor. It was historically studied to inhibit trypsin and other proteases, but it failed to show clinical efficacy in treating pancreatitis. * **D. Cholestyramine:** This is a bile acid sequestrant used for hyperlipidemia or pruritus in obstructive jaundice; it has no role in the acute management of pancreatitis. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause:** Gallstones (overall), Alcohol (second most common). * **Ranson Criteria (at 48 hours):** Remember the mnemonic **C H O B A S** (Calcium <8, Hematocrit drop >10%, Oxygen/PaO2 <60, BUN rise >5, Base deficit >4, Sequestration of fluids >6L). * **Drug of Choice for Pain:** **Fentanyl** or Buprenorphine. (Morphine is traditionally avoided due to theoretical Spasm of the Sphincter of Oddi, though this is debated). * **Sentinel Loop:** A localized ileus of the jejunum seen on X-ray, indicating underlying pancreatitis.

Question 72: Which of the following drugs is not a known cause of acute pancreatitis?

A. Azathioprine
B. Pentamidine
C. Metronidazole
D. L-asparaginase (Correct Answer)

Explanation: **Explanation:** Drug-induced pancreatitis is a rare but important clinical entity, accounting for approximately 0.1–2% of acute pancreatitis cases. The question asks to identify which drug is **not** a known cause; however, there appears to be a discrepancy in the provided key. In clinical practice and standard surgical textbooks (like Bailey & Love), **all four drugs listed are established causes of acute pancreatitis.** **Why L-asparaginase is often the "intended" answer in specific MCQ contexts:** While L-asparaginase is a notorious cause of pancreatitis (occurring in up to 10% of patients treated for ALL), some examiners classify it separately because its mechanism involves profound protein synthesis inhibition rather than hypersensitivity or toxic metabolite accumulation. However, strictly speaking, it **is** a cause. If this question appeared in NEET-PG with the provided key, it suggests a focus on "Class I" vs. "Class II" drug associations, though this is controversial. **Analysis of Options:** * **A. Azathioprine:** A well-documented **Class Ia** drug (strongest evidence). It is one of the most common causes of drug-induced pancreatitis, often occurring within the first month of treatment for IBD or post-transplant. * **B. Pentamidine:** Frequently used for *Pneumocystis jirovecii*, it is directly toxic to pancreatic islet cells and can cause both pancreatitis and hypoglycemia/diabetes. * **C. Metronidazole:** A recognized cause of acute pancreatitis, likely through the formation of redox-active metabolites that induce oxidative stress in the pancreas. * **D. L-asparaginase:** Highly associated with acute pancreatitis. It causes a decrease in insulin and plasma proteins, leading to necrotizing pancreatitis in severe cases. **NEET-PG High-Yield Pearls:** * **Most common drugs (Class Ia):** Azathioprine, 6-Mercaptopurine, Valproic acid, Estrogens, and Thiazides. * **Steroids:** Their role is controversial; while often listed, recent evidence suggests the underlying disease being treated is more likely the cause. * **Clinical Tip:** Drug-induced pancreatitis is usually mild and self-limiting upon withdrawal of the offending agent. Re-challenge is generally contraindicated.

Question 73: In a patient with chronic pancreatitis limited to the tail and body of the pancreas with a main pancreatic duct diameter of 4mm, what would be the ideal treatment?

A. Stenting
B. Puestow's operation
C. Frey's operation
D. Distal pancreatectomy (Correct Answer)

Explanation: **Explanation:** The management of chronic pancreatitis is dictated by the **anatomical distribution** of the disease and the **diameter of the Main Pancreatic Duct (MPD)**. **Why Distal Pancreatectomy is correct:** In this clinical scenario, the disease is **localized** (limited to the body and tail). When chronic pancreatitis is focal and involves the distal segment, resection of the diseased portion is the definitive treatment. Furthermore, the MPD diameter is **4mm**. For a drainage procedure (like Puestow) to be successful and remain patent, the duct generally needs to be dilated to **≥6mm**. Since the duct is "narrow" (relative to surgical drainage standards) and the disease is localized distally, a **Distal Pancreatectomy** is the ideal choice. **Analysis of Incorrect Options:** * **Stenting (Endotherapy):** This is typically a temporizing measure for dominant strictures in the head or body but does not provide a definitive cure for localized parenchymal disease. * **Puestow’s Operation (Lateral Pancreaticojejunostomy):** This is a drainage procedure indicated for **diffuse** disease with a **dilated MPD (≥6mm)**. It is inappropriate here due to the localized nature and the small duct diameter (4mm). * **Frey’s Operation:** This involves local resection of the pancreatic head combined with longitudinal drainage. It is the procedure of choice for **head-dominant** disease with a dilated duct, which is not the case here. **High-Yield Clinical Pearls for NEET-PG:** * **Chain of Lakes Appearance:** Classic radiological finding in chronic pancreatitis on ERCP/MRCP. * **Surgery for Pain:** The most common indication for surgery in chronic pancreatitis is intractable pain. * **Duct Diameter Rule:** MPD <6mm = Resection (e.g., Distal pancreatectomy or Whipple); MPD ≥6mm = Drainage (e.g., Puestow). * **Beger’s Procedure:** Duodenum-preserving pancreatic head resection (DPPHR).

Question 74: Which of the following is NOT a contraindication for enteral nutrition?

A. Severe diarrhea
B. Severe pancreatitis (Correct Answer)
C. Inflammatory Bowel Disease (IBD)
D. Intestinal fistula

Explanation: **Explanation:** The core principle in modern surgical nutrition is **"If the gut works, use it."** Enteral nutrition (EN) is generally preferred over parenteral nutrition because it maintains the gut mucosal barrier, prevents bacterial translocation, and reduces the risk of sepsis. **Why "Severe Pancreatitis" is the correct answer:** Historically, patients with severe acute pancreatitis were kept "NPO" (nothing by mouth) to "rest the pancreas." However, current guidelines (IAP/APA) state that **severe pancreatitis is an indication for, rather than a contraindication to, enteral nutrition.** Starting EN (especially via nasojejunal or even nasogastric routes) within 48–72 hours reduces infectious complications, multi-organ failure, and mortality compared to parenteral nutrition. It does not significantly stimulate pancreatic secretions if delivered distally. **Why the other options are contraindications:** * **Severe Diarrhea:** This indicates significant malabsorption or intestinal transit issues where the gut cannot effectively process nutrients, making EN ineffective or harmful. * **Inflammatory Bowel Disease (IBD):** While EN is used in IBD, **severe/fulminant** presentations (like toxic megacolon or complete bowel obstruction) are contraindications. In the context of this question, it represents a state where the bowel may require complete rest. * **Intestinal Fistula:** High-output fistulae (>500ml/day) are relative or absolute contraindications for distal EN because feeding can increase output and prevent the fistula from closing. **NEET-PG High-Yield Pearls:** * **Preferred Route in Pancreatitis:** Nasojejunal (NJ) feeding was traditionally preferred to bypass the cephalic/gastric phases of secretion, but recent studies show **Nasogastric (NG)** feeding is equally safe and effective. * **Total Parenteral Nutrition (TPN)** is reserved only for patients who cannot tolerate EN after 5–7 days. * **Absolute Contraindications to EN:** Mechanical bowel obstruction, severe shock (mesenteric ischemia risk), and intestinal perforation.

Question 75: Which of the following imaging modalities is least sensitive in the preoperative evaluation of parathyroid adenoma in primary hyperparathyroidism?

A. Sestamibi scintigraphy
B. Sestamibi SPECT
C. MRI (Correct Answer)
D. Ultrasound

Explanation: In the preoperative evaluation of primary hyperparathyroidism, the primary goal is to localize the hyperfunctioning parathyroid gland to facilitate minimally invasive parathyroidectomy. **Why MRI is the Correct Answer:** MRI is considered the **least sensitive** (sensitivity ~40–80%) among the listed modalities for initial localization. While it provides excellent anatomical detail and is useful for detecting ectopic glands (e.g., mediastinal), it is expensive, time-consuming, and prone to motion artifacts. It is typically reserved as a second-line or "rescue" imaging modality when first-line studies are negative or in cases of recurrent/persistent hyperparathyroidism. **Analysis of Incorrect Options:** * **Ultrasound (Option D):** Usually the **first-line** investigation. It is highly sensitive (70–90%) for glands in the typical perithyroidal location and has the advantage of being non-invasive and radiation-free. * **Sestamibi Scintigraphy (Option A):** Uses Technetium-99m (99mTc) methoxyisobutylisonitrile, which is taken up by mitochondria-rich oxyphil cells in adenomas. It has a high sensitivity (70–90%) and is excellent for detecting ectopic glands. * **Sestamibi SPECT (Option B):** Single-photon emission computed tomography (SPECT) provides 3D localization and is **more sensitive** than planar scintigraphy, especially for small adenomas or those deep in the neck/mediastinum. **NEET-PG High-Yield Pearls:** * **Best Initial Investigation:** Ultrasound + Sestamibi scan (Combined sensitivity >95%). * **Most Sensitive Imaging:** **4D-CT** is currently regarded as the most sensitive modality for localizing parathyroid adenomas, especially in re-operative cases. * **Definitive Diagnosis:** Primary hyperparathyroidism is diagnosed **biochemically** (elevated Calcium and PTH), not by imaging. Imaging is only for surgical planning. * **Intraoperative Confirmation:** **Miami Criteria** (a >50% drop in intraoperative PTH levels 10 minutes after excision) confirms successful removal.

Question 76: A 49-year-old man presents with acute abdominal pain and jaundice. Radiographic studies reveal a tumor in the head of the pancreas. Which of the following structures is most likely being obstructed?

A. Common bile duct (Correct Answer)
B. Common hepatic duct
C. Cystic duct
D. Accessory pancreatic duct

Explanation: ### Explanation **1. Why the Correct Answer is Right:** The **Common Bile Duct (CBD)** is the structure most likely obstructed in this scenario. Anatomically, the distal portion of the CBD (intrapancreatic part) passes through or behind the **head of the pancreas** before joining the main pancreatic duct to enter the duodenum at the Ampulla of Vater. A tumor in the pancreatic head causes extrinsic compression or direct invasion of this segment, leading to **obstructive jaundice** (characterized by elevated conjugated bilirubin, pale stools, and dark urine). **2. Why the Incorrect Options are Wrong:** * **Common Hepatic Duct (B):** This duct is formed by the union of the right and left hepatic ducts and is located superior to the pancreas, near the porta hepatis. It would only be involved in very high biliary obstructions (e.g., Klatskin tumors). * **Cystic Duct (C):** This duct drains the gallbladder into the CBD. Obstruction here causes cholecystitis or biliary colic but does **not** cause jaundice, as bile can still flow from the liver through the CBD into the duodenum. * **Accessory Pancreatic Duct (D):** Also known as the Duct of Santorini, it drains the upper part of the pancreatic head. While it may be compressed, its obstruction does not cause jaundice. **3. Clinical Pearls for NEET-PG:** * **Courvoisier’s Law:** In a patient with obstructive jaundice, if the gallbladder is palpable, the cause is unlikely to be gallstones (as the gallbladder is usually fibrotic) and more likely to be a **malignancy of the pancreatic head** or periampullary region. * **Painless Jaundice:** Classically associated with pancreatic head carcinoma (though the question mentions pain, which can occur in later stages). * **Double Duct Sign:** On ERCP/MRCP, simultaneous dilatation of both the CBD and the Main Pancreatic Duct is highly suggestive of a pancreatic head mass.

Question 77: Which of the following statements is NOT true about acute pancreatitis?

A. Gallstones and alcohol are common causes.
B. Serum amylase levels remain elevated for more than 72 hours after the onset of the attack. (Correct Answer)
C. It can lead to secondary pleural effusion.
D. It can present with shock.

Explanation: ### Explanation **Why Option B is the Correct Answer (The False Statement):** Serum amylase is a sensitive but transient marker in acute pancreatitis. It typically rises within 2–12 hours of onset and peaks at 24 hours. However, due to its short half-life and rapid renal clearance, **serum amylase levels usually return to normal within 3 to 5 days (48–72 hours).** Therefore, the statement that it *remains* elevated for more than 72 hours is generally incorrect. In contrast, **Serum Lipase** remains elevated for a longer period (7–14 days) and is more specific for pancreatic injury. **Analysis of Other Options:** * **Option A:** Gallstones (most common globally) and alcohol (second most common) account for nearly 80% of all cases of acute pancreatitis. * **Option C:** Acute pancreatitis can cause **exudative pleural effusion** (typically left-sided) due to diaphragmatic inflammation or the formation of a pancreaticopleural fistula. The fluid usually has high amylase content. * **Option D:** Severe acute pancreatitis can lead to **hypovolemic shock** (due to "third-spacing" of fluids) or **septic shock** (due to infected necrosis), often accompanied by Systemic Inflammatory Response Syndrome (SIRS). **High-Yield Clinical Pearls for NEET-PG:** * **Lipase vs. Amylase:** Lipase is the preferred biochemical test due to higher sensitivity and a longer diagnostic window. * **Severity Scoring:** Ranson’s Criteria, APACHE II, and the **BISAP score** are frequently tested for predicting prognosis. * **Imaging:** Contrast-Enhanced CT (CECT) is the gold standard for diagnosing necrosis but is ideally performed **72–96 hours** after symptom onset for maximum accuracy. * **Cullen’s Sign:** Periumbilical ecchymosis indicating retroperitoneal hemorrhage (associated with necrotizing pancreatitis).

Question 78: A patient with obstructive jaundice due to pancreatic cancer might have all of the following clinical findings except?

A. A palpable gallbladder
B. Pain is early in the course of the disease (Correct Answer)
C. Pulmonary metastasis
D. Thrombocytopenia

Explanation: ### Explanation **1. Why "Pain is early in the course of the disease" is the Correct Answer:** Pancreatic cancer, particularly in the head of the pancreas, is notorious for being a **"silent killer."** The classic clinical presentation is **painless, progressive obstructive jaundice.** Pain typically develops only in the advanced stages when the tumor invades the celiac plexus or causes significant ductal obstruction. Therefore, early-stage disease is usually asymptomatic or presents only with jaundice and weight loss. **2. Analysis of Incorrect Options:** * **A. A palpable gallbladder:** This refers to **Courvoisier’s Law**, which states that in a patient with obstructive jaundice, if the gallbladder is palpable, the obstruction is unlikely to be due to a stone (as stones cause a fibrotic, non-distensible gallbladder). Instead, it suggests a malignant obstruction (e.g., pancreatic head cancer). * **C. Pulmonary metastasis:** Pancreatic cancer is highly aggressive. While it primarily spreads to the liver and peritoneum, the lungs are the most common site of extra-abdominal visceral metastasis. * **D. Thrombocytopenia:** While not a primary symptom, it can occur in advanced pancreatic cancer due to **disseminated intravascular coagulation (DIC)**, hypersplenism from portal/splenic vein thrombosis, or bone marrow infiltration. **3. High-Yield Clinical Pearls for NEET-PG:** * **Courvoisier’s Sign:** Palpable, non-tender gallbladder + Jaundice = Malignancy (Pancreatic head cancer/Periampullary CA). * **Trousseau’s Sign of Malignancy:** Migratory thrombophlebitis (recurrent blood clots in superficial veins) is a classic paraneoplastic syndrome associated with pancreatic cancer. * **Tumor Marker:** **CA 19-9** is the most specific marker for monitoring response to treatment (not for screening). * **Investigation of Choice:** **CECT (Triple-phase CT)** is the gold standard for diagnosis and staging.

Question 79: What is the most common complication of the Whipple procedure?

A. Delayed gastric emptying (Correct Answer)
B. Bleeding
C. Exocrine insufficiency
D. Anastomotic leak

Explanation: The Whipple procedure (Pancreaticoduodenectomy) is a complex surgery involving multiple anastomoses. Understanding its complications is high-yield for NEET-PG. **Correct Answer: A. Delayed Gastric Emptying (DGE)** DGE is the **most common** complication following a Whipple procedure, occurring in approximately **15–40%** of patients. It is defined by the inability to tolerate oral intake by the end of the first postoperative week or the need for prolonged nasogastric tube (NGT) decompression. The underlying pathophysiology is multifactorial, involving the loss of neural pathways (vagotomy effect), reduction in motilin levels (due to duodenal resection), and local inflammation/edema at the gastrojejunostomy. **Explanation of Incorrect Options:** * **B. Bleeding:** While life-threatening (especially if secondary to a sentinel bleed from a pseudoaneurysm), it occurs in less than 10% of cases. * **C. Exocrine Insufficiency:** This is a common **long-term/late** sequela rather than an immediate postoperative complication. * **D. Anastomotic Leak:** Specifically, a **Postoperative Pancreatic Fistula (POPF)** is the most feared and "signature" complication of Whipple’s, but its incidence (approx. 10–15%) is lower than that of DGE. **High-Yield Clinical Pearls for NEET-PG:** * **Most common complication:** Delayed Gastric Emptying. * **Most common cause of mortality:** Postoperative Pancreatic Fistula (POPF) leading to sepsis or hemorrhage. * **ISGPS Criteria:** Complications like DGE and POPF are graded (A, B, C) based on clinical impact. * **Management of DGE:** Primarily conservative (NGT suction, prokinetics like Erythromycin, and nutritional support).

Question 80: Which of the following is associated with acute pancreatitis?

A. Elevated serum amylase
B. Alcohol
C. Gallbladder stones
D. All of the above (Correct Answer)

Explanation: **Explanation:** Acute pancreatitis is an inflammatory condition of the pancreas characterized by premature activation of digestive enzymes, leading to autodigestion of the gland. The correct answer is **"All of the above"** because it encompasses both the primary etiologies and the hallmark biochemical marker of the disease. * **Gallbladder stones (Option C):** Globally and in India, gallstones are the **most common cause** of acute pancreatitis. A stone obstructing the Ampulla of Vater causes reflux of bile into the pancreatic duct or increases ductal pressure, triggering enzyme activation. * **Alcohol (Option B):** This is the **second most common cause**. Alcohol exerts a direct toxic effect on acinar cells and increases the protein content of pancreatic secretions, leading to the formation of protein plugs that obstruct small ducts. * **Elevated serum amylase (Option A):** This is the classic biochemical marker used for diagnosis. Serum amylase levels typically rise within 2–12 hours of onset. A level **>3 times the upper limit of normal** is highly suggestive of acute pancreatitis. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Requires 2 out of 3 criteria: (1) Characteristic abdominal pain, (2) Serum amylase or lipase >3x normal, (3) Characteristic findings on imaging (CECT). * **Lipase vs. Amylase:** Serum lipase is **more specific** and remains elevated longer than amylase, making it the preferred biochemical test. * **Scoring Systems:** Modified Glasgow, Ranson’s, and APACHE II are used to predict severity. **BISAP** is a quick bedside tool. * **Imaging:** CECT is the gold standard for assessing necrosis but is ideally performed **72 hours after** symptom onset to accurately demarcate non-viable tissue.

Practice by Chapter

Pancreatic Anatomy and Physiology

Practice Questions

Acute Pancreatitis

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Chronic Pancreatitis

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Pancreatic Pseudocysts

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Pancreatic Adenocarcinoma

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Cystic Neoplasms of Pancreas

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Neuroendocrine Tumors of Pancreas

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Pancreatic Trauma

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Pancreatectomy Techniques

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Whipple Procedure

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Pancreatic Anastomosis

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Complications of Pancreatic Surgery

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