Pancreatic Surgery Practice Questions

Q: What is true regarding pancreatic trauma?

Amylase levels are elevated in 90% of cases. **Explanation:** Pancreatic trauma is relatively rare due to the organ's retroperitoneal location, but it carries high morbidity. **Why Option D is Correct:** Serum amylase is a sensitive but non-specific marker in pancreatic trauma. While it may be normal initially (in about 20-40% of cases), serial monitoring shows that **amylase levels eventually become elevated in approximately 90% of patients**. It is important to note that the degree of elevation does not necessarily correlate with the severity of the ductal injury. **Why Other Options are Incorrect:** * **Option A:** Solitary involvement is **rare**. Because of the pancreas's central location, 90% of cases involve associated injuries to adjacent organs like the liver, spleen, duodenum, or major vessels. * **Option B:** While blunt trauma (e.g., "handlebar injury" in children or steering wheel impact) is a classic cause, globally, **penetrating trauma** (gunshot or stab wounds) is the more frequent cause of pancreatic injury in many trauma centers. * **Option C:** Surgery is **not always needed**. Grade I and II injuries (minor contusions or lacerations without ductal involvement) are often managed conservatively. Surgery is reserved for Grade III+ injuries involving ductal disruption. **NEET-PG High-Yield Pearls:** * **Investigation of Choice:** Contrast-Enhanced CT (CECT) is the gold standard for stable patients. * **Management Gold Standard:** The integrity of the **Main Pancreatic Duct** is the most important factor determining management. * **Surgical Approach:** Distal to the SMV (body/tail) with duct injury → Distal Pancreatectomy. Proximal to the SMV (head) with duct injury → Wide drainage or Whipple’s (if severe). * **Common Complication:** Pancreatic fistula is the most common complication following trauma.

Q: What is the investigation of choice for chronic pancreatitis?

Endoscopic Retrograde Cholangiopancreatography (ERCP). **Explanation:** **Why ERCP is the Correct Answer:** Endoscopic Retrograde Cholangiopancreatography (ERCP) is traditionally considered the **gold standard** for diagnosing chronic pancreatitis because of its high sensitivity in detecting early ductal changes. It allows for the visualization of the "Chain of Lakes" appearance (alternating segments of dilation and stenosis in the main pancreatic duct). While MRCP is now the preferred non-invasive diagnostic tool, ERCP remains the "investigation of choice" in many classic MCQ formats due to its ability to provide detailed ductal anatomy and its therapeutic potential (stenting/stone removal). **Analysis of Incorrect Options:** * **A. Ultrasound (USG):** Often the initial screening tool. It can show calcifications or pseudocysts but lacks the sensitivity to detect early-stage chronic pancreatitis or subtle ductal changes. * **B. Abdominal X-ray:** Useful only for identifying **pancreatic calcifications** (seen in ~30% of cases), which is a pathognomonic sign. However, a negative X-ray does not rule out the disease. * **C. Barium Study:** This is obsolete for pancreatic pathology. It may indirectly show an "inverted 3 sign" (Frostberg’s sign) on the duodenum due to an enlarged pancreatic head, but it cannot diagnose the parenchyma or ducts. **High-Yield Clinical Pearls for NEET-PG:** * **Most sensitive non-invasive test:** Magnetic Resonance Cholangiopancreatography (MRCP) with Secretin enhancement. * **Most sensitive imaging for early changes:** Endoscopic Ultrasound (EUS). * **Pathognomonic finding:** Pancreatic calcifications on CT or X-ray. * **Classic Sign:** "Chain of Lakes" appearance (dilated duct with strictures). * **Triad of Chronic Pancreatitis:** Steatorrhea, Diabetes Mellitus, and Pancreatic Calcifications.

Q: What are the treatment options for a pseudocyst of the pancreas?

All of the above. **Explanation:** A pancreatic pseudocyst is a collection of fluid rich in pancreatic enzymes, enclosed by a wall of fibrous or granulation tissue (lacking an epithelial lining). Treatment is indicated for cysts that are symptomatic, enlarging, or complicated (e.g., infection, hemorrhage, or gastric outlet obstruction). **Why "All of the above" is correct:** The management of a pseudocyst depends on its location, the thickness of its wall (maturation), and its relationship to adjacent organs. * **Cystogastrostomy:** The preferred procedure for cysts firmly adherent to the posterior wall of the stomach. It allows internal drainage into the gastric lumen. * **Cystojejunostomy:** Indicated for large cysts or those located in the head/body of the pancreas that cannot be easily drained into the stomach. A Roux-en-Y loop of the jejunum is used for drainage. * **Excision of the cyst:** While less common due to the risk of injury to surrounding structures, excision (or distal pancreatectomy including the cyst) is a definitive option for cysts located in the **tail of the pancreas**. **Clinical Pearls for NEET-PG:** * **Wait and Watch:** Most pseudocysts (<6 cm) resolve spontaneously. Observation is recommended for at least **6 weeks** to allow the cyst wall to "mature" (thicken) before surgical intervention. * **Gold Standard Investigation:** Contrast-Enhanced CT (CECT) is the investigation of choice. * **Internal Drainage:** This is the mainstay of surgical treatment. Percutaneous external drainage is generally avoided due to the high risk of forming a pancreaticocutaneous fistula. * **EUS-guided drainage:** Currently the preferred minimally invasive approach for internal drainage in many centers.

Q: What is the most common mutation in pancreatic adenocarcinoma?

K-ras. **Explanation:** Pancreatic ductal adenocarcinoma (PDAC) follows a well-defined genetic progression model involving the activation of oncogenes and the inactivation of tumor suppressor genes. **1. Why K-ras is correct:** The **K-ras** oncogene (located on chromosome 12p) is the most frequently mutated gene in pancreatic cancer, present in **>90-95% of cases**. It is considered an "initiating" mutation because it occurs very early in the progression from Pancreatic Intraepithelial Neoplasia (PanIN-1) to invasive carcinoma. K-ras mutations lead to constitutive activation of signaling pathways that promote uncontrolled cell proliferation and survival. **2. Why the other options are incorrect:** * **p16 (CDKN2A):** This is the most common **tumor suppressor gene** inactivated in pancreatic cancer (found in ~95% of cases). However, K-ras remains the most common overall mutation and the hallmark initiating event. * **p53 (TP53):** This tumor suppressor gene is mutated in about 50-75% of cases. It typically occurs later in the progression (PanIN-3 stage) compared to K-ras. * **BRAF:** While common in melanoma and colorectal cancers, BRAF mutations are rare in pancreatic adenocarcinoma, though they may be seen in a small subset of K-ras wild-type tumors. **High-Yield Clinical Pearls for NEET-PG:** * **Sequence of mutations:** K-ras (Early/PanIN-1) → p16 (Intermediate/PanIN-2) → p53 & SMAD4/DPC4 (Late/PanIN-3). * **SMAD4 (DPC4):** Inactivation is relatively specific to pancreatic cancer and is often associated with poor prognosis and distant metastasis. * **Tumor Marker:** CA 19-9 is the most common marker used for monitoring, but it is not used for screening. * **Risk Factors:** Smoking is the most consistent environmental risk factor.

Q: A 35-year-old patient presents with fever, severe epigastric abdominal pain radiating to the back, and a history of binge drinking. The pulse is 120 bpm and blood pressure is 90/60 mm Hg. A CT abdomen with contrast was performed. What is the most likely diagnosis?

Acute pancreatitis. **Explanation:** The clinical presentation of severe epigastric pain radiating to the back, associated with a history of binge drinking and signs of systemic inflammatory response (tachycardia and hypotension), is a classic hallmark of **Acute Pancreatitis**. **Why Acute Pancreatitis is correct:** Alcohol is the second most common cause of acute pancreatitis (after gallstones). The pain is typically sudden, intense, and radiates to the back due to the retroperitoneal location of the pancreas. The presence of hypotension (90/60 mmHg) and tachycardia (120 bpm) suggests severe pancreatitis with systemic involvement or "third-spacing" of fluids. Contrast-Enhanced CT (CECT) is the gold standard for diagnosing pancreatic necrosis and assessing severity. **Why other options are incorrect:** * **Peptic Ulcer:** While it causes epigastric pain, it rarely causes such profound hemodynamic instability unless perforated (which would show free air under the diaphragm) or bleeding. * **Chronic Calcific Pancreatitis:** This presents with recurrent, chronic pain, steatorrhea, and diabetes. It is a permanent structural change rather than an acute inflammatory episode with systemic shock. * **Acute Cholecystitis:** Pain is typically located in the Right Upper Quadrant (RUQ) and radiates to the right shoulder/scapula (Boas' sign), not the back. **High-Yield Clinical Pearls for NEET-PG:** * **Diagnosis:** Requires 2 of 3: (1) Typical abdominal pain, (2) Serum amylase/lipase >3x normal, (3) Characteristic findings on imaging. * **Lipase vs. Amylase:** Lipase is more specific and remains elevated longer than amylase. * **Prognostic Markers:** Ranson’s Criteria, APACHE II, and elevated **BUN/Hematocrit** (indicators of hemoconcentration) are used to predict severity. * **Imaging Timing:** CECT is most accurate for assessing necrosis 72–96 hours after symptom onset.

Q: All the following can be used to predict severe acute pancreatitis except?

Serum lipase > 5 times the normal. **Explanation:** The severity of acute pancreatitis is determined by the presence of **organ failure** (respiratory, renal, or cardiovascular) and **local complications** (necrosis, pseudocyst, or abscess), rather than the absolute level of pancreatic enzymes [1]. **Why Option D is the Correct Answer:** Serum amylase and lipase levels are essential for the **diagnosis** of acute pancreatitis (requiring a rise of >3 times the upper limit of normal). However, the magnitude of the elevation does **not** correlate with the severity of the disease, the prognosis, or the extent of pancreatic necrosis. A patient with a five-fold increase may have mild interstitial pancreatitis, while a patient with a massive necrotizing process may show only a modest rise. **Analysis of Incorrect Options:** * **APACHE-II Score > 8:** This is a gold-standard physiological scoring system. A score ≥ 8 at any point during the first 48 hours is a reliable predictor of severe disease and increased mortality. * **Glasgow (Imrie) Score > 3:** Similar to the Ranson criteria, this uses clinical and laboratory parameters (Age, WBC, Glucose, Urea, etc.). A score of 3 or more indicates severe pancreatitis [1]. * **CT Severity Score (Balthazar) > 7:** This combines the grade of pancreatitis with the percentage of pancreatic necrosis. A score of 7–10 is associated with high morbidity and mortality [1]. **Clinical Pearls for NEET-PG:** * **BISAP Score:** A simple bedside tool (BUN, Impaired mental status, SIRS, Age >60, Pleural effusion). A score ≥ 3 predicts increased mortality. * **C-Reactive Protein (CRP):** The most useful single biochemical marker for predicting severity; levels **>150 mg/L** at 48 hours indicate severe pancreatitis. * **Most common cause of death:** In the first week, it is **SIRS/Organ failure**; after two weeks, it is **infected pancreatic necrosis** [1].

Question 1

The Duval procedure in chronic pancreatitis involves which of the following?

Accepted Answer

Distal resection of the tail of the pancreas with end-to-end pancreaticojejunostomy

Answer

Distal resection of the tail of the pancreas with a longitudinal opening of the duct and pancreaticojejunostomy

Answer

Duodenum-preserving pancreatic head resection

Answer

Local resection of the pancreatic head with longitudinal pancreaticojejunostomy

Question 2

What is true regarding pancreatic trauma?

Accepted Answer

Amylase levels are elevated in 90% of cases

Answer

Solitary involvement is common

Answer

Blunt injury is the usual cause

Answer

Surgery is always needed

Question 3

What is the investigation of choice for chronic pancreatitis?

Accepted Answer

Endoscopic Retrograde Cholangiopancreatography (ERCP)

Answer

Ultrasound (USG)

Answer

Abdominal X-ray

Answer

Barium study

Question 4

What are the treatment options for a pseudocyst of the pancreas?

Accepted Answer

All of the above

Answer

Cystogastrostomy

Answer

Cystojejunostomy

Answer

Excision of the cyst

Question 5

What is the most common mutation in pancreatic adenocarcinoma?

Accepted Answer

K-ras

Answer

p16

Answer

p53

Answer

BRAF

Question 6

A 35-year-old man presents with acute pancreatitis. What is the ideal fluid of choice for management?

Accepted Answer

Isotonic crystalloid

Answer

Hypertonic crystalloid

Answer

Hypotonic crystalloid

Answer

Vasopressin

Question 7

A 35-year-old patient presents with fever, severe epigastric abdominal pain radiating to the back, and a history of binge drinking. The pulse is 120 bpm and blood pressure is 90/60 mm Hg. A CT abdomen with contrast was performed. What is the most likely diagnosis?

Accepted Answer

Acute pancreatitis

Answer

Peptic ulcer

Answer

Chronic calcific pancreatitis

Answer

Acute cholecystitis

Question 8

A patient with necrotizing pancreatitis undergoes CT guided aspiration, which results in growth of E-coli on culture. What is the most appropriate treatment?

Accepted Answer

Exploratory laparotomy

Answer

Culture-appropriate antibiotic therapy

Answer

ERCP with sphincterotomy

Answer

CT guided placement of drain(s)

Question 9

All the following can be used to predict severe acute pancreatitis except?

Accepted Answer

Serum lipase > 5 times the normal

Answer

Glasgow score > 3

Answer

CT severity score > 7

Answer

APACHE-II score > 8

Question 10

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

Accepted Answer

Prothrombin time > 2 seconds above control

Answer

Total leukocyte count > 16000 cells/mm

Answer

Serum calcium < 8 mg/dL

Answer

Serum glucose > 200 mg/dL

Pancreatic Surgery — MCQs

Pancreatic Surgery — MCQs

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