Pancreatic Surgery Practice Questions

Q: What is the commonest cause of acute pancreatitis?

Biliary calculi. **Explanation:** Acute pancreatitis is an inflammatory condition of the pancreas characterized by the premature activation of digestive enzymes. Understanding its etiology is high-yield for NEET-PG. **1. Why Biliary Calculi is Correct:** Globally and in India, **biliary calculi (gallstones)** are the most common cause of acute pancreatitis, accounting for approximately **35–45%** of cases. The mechanism involves a stone obstructing the Ampulla of Vater or the pancreatic duct, leading to increased ductal pressure and the reflux of bile into the pancreatic duct, which triggers enzyme activation and autodigestion of the gland. **2. Analysis of Incorrect Options:** * **Alcohol abuse:** This is the **second most common cause** overall (approx. 30%) and the most common cause of *chronic* pancreatitis. In some Western demographics, it may rival gallstones, but statistically, biliary causes remain more frequent. * **Infective causes:** While viruses (Mumps, Coxsackie, HIV) and parasites (Ascaris) can cause pancreatitis, they are rare compared to metabolic or mechanical causes. * **Idiopathic causes:** About 10–20% of cases have no identifiable cause after initial workup. However, many "idiopathic" cases are later found to be due to biliary sludge or microlithiasis. **3. High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic (GET SMASHED):** **G**allstones, **E**thanol, **T**rauma, **S**teroids, **M**umps, **A**utoimmune, **S**corpion sting, **H**ypertriglyceridemia/Hypercalcemia, **E**RCP, **D**rugs (e.g., Azathioprine, Thiazides). * **Iatrogenic Cause:** Post-ERCP pancreatitis is a significant clinical concern. * **Diagnosis:** Requires 2 out of 3: (1) Typical abdominal pain, (2) Serum Amylase/Lipase >3x normal, (3) Characteristic findings on imaging (CECT is the gold standard).

Q: A 60-year-old chronic smoker presented with jaundice, anorexia, and weight loss. ERCP was performed. What is the most likely diagnosis based on ERCP findings?

Carcinoma of the pancreas. ***Carcinoma of the pancreas*** - **Double duct sign** on ERCP (simultaneous dilation of common bile duct and main pancreatic duct) is pathognomonic for **carcinoma of the head of pancreas**. - Clinical triad of **painless obstructive jaundice**, **weight loss**, and **smoking history** strongly suggests pancreatic adenocarcinoma. *Choledochal cyst* - ERCP would show **cystic dilation** of the bile duct, typically presenting in **childhood or young adults**. - Associated with **choledochal-pancreatic malunion** and **recurrent cholangitis**, not the typical presentation described. *Cholangiocarcinoma* - ERCP typically shows **strictures** and **irregular narrowing** of bile ducts with **beading appearance**. - Usually presents with **cholangitis** and **pruritus** rather than the classic pancreatic cancer triad. *Chronic pancreatitis* - ERCP shows **chain of lakes appearance** with alternating **strictures and dilatations** of the pancreatic duct. - Typically presents with **chronic abdominal pain**, **diabetes mellitus**, and **steatorrhea** rather than painless jaundice.

Q: What is the best diagnostic modality for pancreatic cancer located in the head of the pancreas?

Endoscopic retrograde cholangiopancreatography (ERCP). ### Explanation The diagnosis of pancreatic head cancer relies on identifying both the mass and its effect on the biliary and pancreatic ducts. **Why ERCP is the Correct Answer:** In the context of traditional surgical teaching and specific NEET-PG patterns, **ERCP** is considered a superior diagnostic modality for lesions in the head of the pancreas because of its high sensitivity in detecting ductal changes. It can demonstrate the pathognomonic **"Double Duct Sign"** (simultaneous dilatation of the common bile duct and the main pancreatic duct), which is highly suggestive of a head of pancreas malignancy. Furthermore, ERCP allows for tissue acquisition via brush cytology or biopsy and provides a therapeutic window for stenting in patients with obstructive jaundice. **Analysis of Incorrect Options:** * **Ultrasound (A):** Often the initial screening tool, but it is frequently limited by overlying bowel gas and has low sensitivity for small tumors (<2 cm). * **CAT Scan (C):** While **Contrast-Enhanced CT (CECT)** is the gold standard for **staging** and assessing resectability (evaluating vascular invasion), ERCP is traditionally prioritized in exams for its diagnostic precision regarding ductal anatomy in head lesions. * **PTC (D):** An invasive procedure used primarily when ERCP fails or when there is high biliary obstruction. It does not visualize the pancreatic duct. **High-Yield Clinical Pearls for NEET-PG:** * **Gold Standard for Staging:** Triple-phase Contrast-Enhanced CT (CECT). * **Most Common Presentation:** Painless progressive obstructive jaundice. * **Tumor Marker:** CA 19-9 (used for monitoring recurrence, not for primary diagnosis). * **Courvoisier’s Law:** In a patient with obstructive jaundice, if the gallbladder is palpable, the obstruction is unlikely to be due to a stone (points towards malignancy like pancreatic head cancer).

Q: What is the treatment of choice for an asymptomatic pancreatic pseudocyst?

Conservative management. **Explanation:** The management of a pancreatic pseudocyst is primarily determined by the presence of symptoms and the risk of complications, rather than just the size or duration of the cyst. **1. Why Conservative Management is Correct:** Most pancreatic pseudocysts (up to 50-70%) resolve spontaneously without intervention. In an **asymptomatic** patient, the standard of care is "watchful waiting" with serial imaging (CT or Ultrasound). Intervention is only indicated if the cyst becomes symptomatic (pain, early satiety), gets infected, causes biliary/gastric outlet obstruction, or shows a rapid increase in size. The old "6-week, 6-cm" rule is no longer strictly followed if the patient remains asymptomatic. **2. Why the Other Options are Incorrect:** * **Marsupialization (A):** This is an obsolete surgical technique where the cyst is opened and stitched to the skin. It is rarely performed today due to the risk of external pancreatic fistulas. * **Drainage (C):** Percutaneous or endoscopic drainage is reserved for **symptomatic** or **infected** pseudocysts. Routine drainage of asymptomatic cysts increases the risk of introducing infection into a sterile collection. * **Cystogastrostomy (D):** This is the surgical/endoscopic internal drainage procedure of choice for pseudocysts located behind the stomach. However, it is only indicated for **symptomatic** cysts that have a mature wall (usually after 6 weeks). **Clinical Pearls for NEET-PG:** * **Definition:** A pseudocyst lacks an epithelial lining (lined by granulation/fibrous tissue) and usually occurs 4+ weeks after an episode of acute pancreatitis. * **Most common site:** Lesser sac. * **Gold Standard Investigation:** Contrast-Enhanced CT (CECT). * **Treatment of Choice (Symptomatic):** Endoscopic Ultrasound (EUS)-guided cystogastrostomy is now preferred over open surgery. * **Most common complication:** Infection (abscess formation).

Q: Which of the following is a poor prognostic factor in a patient with acute pancreatitis?

Leukocytosis > 20,000/mL. In acute pancreatitis, prognosis is determined by the severity of the systemic inflammatory response and organ dysfunction, rather than the magnitude of enzyme elevation. ### **Why Option A is Correct** **Leukocytosis > 20,000/mL** is a recognized indicator of severe inflammation and a poor prognostic marker. It is a key component of the **Ranson Criteria** (measured at admission) and the **Modified Glasgow (Imrie) Score**. A high white cell count reflects a massive systemic inflammatory response syndrome (SIRS), which correlates with an increased risk of pancreatic necrosis, multi-organ failure, and mortality. ### **Why Other Options are Incorrect** * **Options B & C (Serum Amylase and Lipase):** These are diagnostic markers, not prognostic ones. The absolute level of amylase or lipase does **not** correlate with the severity of the disease. A patient with a five-fold increase may have mild interstitial pancreatitis, while a patient with a two-fold increase may have life-threatening hemorrhagic necrosis. * **Option D (Diastolic BP > 90 mm Hg):** Hypertension is not a poor prognostic sign. Conversely, **hypotension** (Systolic BP 200 mg/dL, **A**ge >55 yrs, **L**DH >350 IU/L, **A**ST >250 IU/L, **W**BC >16,000/mm³ (Note: The question uses >20,000, which is even more significant). * **Most sensitive prognostic marker:** C-Reactive Protein (CRP) >150 mg/L at 48 hours. * **Gold standard for assessing severity:** Contrast-Enhanced CT (CECT) performed after 72 hours (Balthazar Scoring). * **BISAP Score:** A simple bedside tool (BUN, Impaired mental status, SIRS, Age >60, Pleural effusion).

Q: What is the most common functional neuroendocrine tumor of the pancreas?

Insulinoma. **Explanation:** **1. Why Insulinoma is Correct:** Insulinoma is the **most common functional pancreatic neuroendocrine tumor (pNET)**. It arises from the beta cells of the islets of Langerhans. Unlike many other pNETs, approximately **90% of insulinomas are benign, solitary, and small (<2 cm)**. They classically present with fasting hypoglycemia due to inappropriate insulin secretion, characterized by the **Whipple’s Triad**: symptoms of hypoglycemia, low plasma glucose (<50 mg/dL), and relief of symptoms after glucose administration. **2. Why Other Options are Incorrect:** * **Gastrinoma (Option A):** This is the second most common functional pNET. It causes **Zollinger-Ellison Syndrome** (refractory peptic ulcers and diarrhea). While common, its incidence is lower than insulinoma. Notably, gastrinomas are more frequently malignant (60-90%) compared to insulinomas. * **Somatostatinoma (Option B):** These are extremely rare. They present with a "inhibitory syndrome" consisting of diabetes mellitus, cholelithiasis, and steatorrhea due to the universal inhibitory action of somatostatin. * **VIPoma (Option C):** Also rare, these secrete Vasoactive Intestinal Peptide, leading to **Verner-Morrison Syndrome** (WDHA syndrome: Watery Diarrhea, Hypokalemia, and Achlorhydria). **3. High-Yield Clinical Pearls for NEET-PG:** * **Localization:** Most insulinomas are distributed equally across the head, body, and tail of the pancreas. * **Diagnosis:** The gold standard is the **72-hour supervised fast** (showing elevated insulin and C-peptide levels during hypoglycemia). * **Rule of 10s:** Approximately 10% of insulinomas are malignant, 10% are multiple, and 10% are associated with **MEN-1 syndrome**. * **Management:** Surgical enucleation is usually curative for small, benign lesions.

Question 1

What is the commonest cause of acute pancreatitis?

Accepted Answer

Biliary calculi

Answer

Alcohol abuse

Answer

Infective causes

Answer

Idiopathic causes

Question 2

A 60-year-old chronic smoker presented with jaundice, anorexia, and weight loss. ERCP was performed. What is the most likely diagnosis based on ERCP findings?

Accepted Answer

Carcinoma of the pancreas

Answer

Choledochal cyst

Answer

Cholangiocarcinoma

Answer

Chronic pancreatitis

Question 3

What is the best diagnostic modality for pancreatic cancer located in the head of the pancreas?

Accepted Answer

Endoscopic retrograde cholangiopancreatography (ERCP)

Answer

Ultrasound

Answer

Computed Axial Tomography (CAT) scan

Answer

Percutaneous transhepatic cholangiography (PTC)

Question 4

What is the treatment of choice for an asymptomatic pancreatic pseudocyst?

Accepted Answer

Conservative management

Answer

Marsupialization

Answer

Drainage

Answer

Cystogastrostomy

Question 5

Which of the following is a poor prognostic factor in a patient with acute pancreatitis?

Accepted Answer

Leukocytosis > 20,000/mL

Answer

Serum amylase

Answer

Serum lipase

Answer

Diastolic BP > 90 mm Hg

Question 6

What is the most common functional neuroendocrine tumor of the pancreas?

Accepted Answer

Insulinoma

Answer

Gastrinoma

Answer

Somatostatinoma

Answer

VIPoma

Question 7

The boundaries of the foramen of Winslow (epiploic foramen) include all of the following EXCEPT:

Accepted Answer

The portal vein, hepatic artery, and common bile duct anteriorly

Answer

The free border of the lesser omentum superiorly

Answer

The descending (second) part of the duodenum inferiorly

Answer

The caudate lobe of the liver posteriorly

Question 8

Which of the following is NOT a medical treatment for pancreatitis?

Accepted Answer

Aprotinin

Answer

Cholestyramine

Answer

Calcium

Answer

Glucagon

Question 9

Which of the following types of pancreatitis has the best prognosis?

Accepted Answer

Gallstone pancreatitis

Answer

Alcoholic pancreatitis

Answer

Postoperative pancreatitis

Answer

Idiopathic pancreatitis

Question 10

An adrenal biopsy should be considered after ruling out which of the following conditions?

Accepted Answer

Pheochromocytoma

Answer

Adrenocortical carcinoma

Answer

Metastases

Answer

Cushing's syndrome

Pancreatic Surgery — MCQs

Pancreatic Surgery — MCQs

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