Pancreatic Surgery Practice Questions

Q: A 30-year-old known alcoholic patient presented with severe abdominal pain. On examination, a rigid abdomen is noted. The patient has a history of multiple episodes of abdominal pain over the last 4-5 years and has lost 5 kg of weight in the past 6 months. Serum lipase and amylase levels are normal. CECT abdomen was performed. What is the most likely diagnosis?

Chronic pancreatitis. ***Chronic pancreatitis*** - **Chronic alcohol use** with recurrent abdominal pain episodes over **4-5 years** and **weight loss** are classic features of chronic pancreatitis with **pancreatic insufficiency**. - **Normal serum lipase and amylase** levels are typical in chronic pancreatitis due to **pancreatic atrophy** and loss of enzyme-producing cells, unlike acute pancreatitis. *Acute pancreatitis* - Would typically present with **markedly elevated serum lipase and amylase** levels, which are normal in this case. - Usually has an **acute onset** rather than the chronic, recurrent pattern described over **4-5 years**. *Adenocarcinoma of pancreas* - More commonly affects patients **>60 years old** and presents with **painless jaundice** rather than recurrent abdominal pain. - **Weight loss** occurs but is usually more **rapid and severe**, and the **rigid abdomen** is less characteristic. *Periampullary carcinoma* - Typically presents with **obstructive jaundice**, **pale stools**, and **dark urine** due to **biliary obstruction**. - **Painless jaundice** is the hallmark feature, not the chronic abdominal pain pattern seen here.

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

Insulinoma. **Explanation:** Pancreatic Neuroendocrine Tumors (pNETs) are categorized into functional (hormone-secreting) and non-functional types [1]. Among functional pNETs, **Insulinoma** is the most common. **1. Why Insulinoma is Correct:** Insulinomas are beta-cell derived tumors that autonomously secrete insulin, leading to fasting hypoglycemia [2]. They are typically small (<2 cm), solitary, and benign (90%). The classic clinical presentation is the **Whipple’s Triad**: symptoms of hypoglycemia, low plasma glucose (<50 mg/dL), and relief of symptoms upon glucose administration. **2. Analysis of Incorrect Options:** * **Gastrinoma (Option A):** This is the second most common functional pNET. It causes Zollinger-Ellison Syndrome (severe peptic ulcers and diarrhea). Note: Gastrinomas are the most common functional pNET in the context of **MEN1 syndrome**, but overall, Insulinoma is more frequent. * **Somatostatinoma (Option B):** These are rare tumors. They present with the "inhibitory syndrome": diabetes mellitus, cholelithiasis, and steatorrhea due to the suppression of insulin, CCK, and pancreatic enzymes. * **VIPoma (Option C):** Also known as Verner-Morrison syndrome, it is rare and characterized by **WDHA syndrome**: Watery Diarrhea, Hypokalemia, and Achlorhydria. **Clinical Pearls for NEET-PG:** * **Rule of 10s for Insulinoma:** 10% are malignant, 10% are multiple, and 10% are associated with MEN1. * **Diagnostic Gold Standard:** 72-hour supervised fast (showing elevated Insulin and C-peptide levels during hypoglycemia) [2]. * **Localization:** Most pNETs are found in the head of the pancreas, but insulinomas are distributed equally throughout the head, body, and tail. * **Medical Management:** Diazoxide is used to inhibit insulin release in inoperable cases.

Q: A patient presents with a three-day history of epigastric pain radiating to the back. Serum amylase levels are normal, but ultrasound of the abdomen reveals gall bladder stones and an enlarged pancreas. A CT scan confirms the diagnosis. Which of the following is the most likely diagnosis?

Acute Pancreatitis. The clinical presentation of epigastric pain radiating to the back is a classic hallmark of **Acute Pancreatitis** [1]. While serum amylase is a common screening tool, its levels peak early and often return to normal within 3–5 days. Since this patient presented on the third day, the normal amylase does not rule out the diagnosis. The definitive evidence comes from the CT scan and ultrasound findings of an enlarged pancreas and gallstones (the most common etiology in India) [1], [3]. **Why other options are incorrect:** * **Acute Cholecystitis:** Typically presents with right upper quadrant pain and Murphy’s sign. While gallstones are present here [3], the CT finding of an enlarged pancreas specifically points toward pancreatitis. * **Acute Appendicitis:** Usually presents with periumbilical pain migrating to the right iliac fossa (McBurney's point), not radiation to the back. * **Acute Peritonitis:** Presents with generalized abdominal rigidity, guarding, and rebound tenderness, usually secondary to a perforated viscus [1]. **NEET-PG High-Yield Pearls:** * **Enzymes:** Serum **Lipase** is more specific and remains elevated longer (7–14 days) than Amylase, making it the preferred biochemical marker for delayed presentations. * **Imaging:** Contrast-Enhanced CT (CECT) is the gold standard for assessing severity and complications (like necrosis) [1] but is ideally performed 48–72 hours after symptom onset. * **Etiology:** Remember the mnemonic **GET SMASHED**. Gallstones (Most common) [3] and Alcohol are the top two causes. * **Prognosis:** Ranson’s Criteria and APACHE II scores are frequently tested for predicting severity [2].

Q: What is the most common complication of chronic pancreatitis?

Pseudocyst. **Explanation:** **Pseudocyst of the pancreas** is the most common complication of chronic pancreatitis, occurring in approximately **20–40%** of patients. It develops when pancreatic secretions are walled off by a fibrous capsule (lacking an epithelial lining) due to ductal obstruction or chronic inflammation. While many are asymptomatic, they can lead to pain, gastric outlet obstruction, or infection. **Analysis of Options:** * **B. Pseudocyst (Correct):** Its high prevalence in the natural history of chronic calcific pancreatitis makes it the leading complication. * **A. Ascites:** Pancreatic ascites occurs due to a leak from a pseudocyst or direct ductal disruption. While a classic board topic, it is significantly less common than the formation of the pseudocyst itself. * **C. Splenic Vein Thrombosis:** This occurs in about 5–10% of cases due to the proximity of the vein to the inflamed pancreas. It leads to "left-sided" or "sinistral" portal hypertension and gastric varices, but it is less frequent than pseudocysts. * **D. Pancreatic Enteric Fistula:** This is a rare complication resulting from the erosion of a pseudocyst or the duct into adjacent hollow viscera (e.g., duodenum or colon). **NEET-PG High-Yield Pearls:** * **Most common cause of Chronic Pancreatitis:** Alcohol (Adults), Cystic Fibrosis (Children). * **Classic Triad:** Steatorrhea, Diabetes Mellitus, and Pancreatic Calcifications (pathognomonic). * **Management of Pseudocyst:** Observation if asymptomatic; **Cystogastrostomy** (Endoscopic or Surgical) if symptomatic or enlarging. * **Chain of Lakes Appearance:** Seen on ERCP/MRCP due to alternating stenosis and dilatation of the main pancreatic duct.

Q: Which of the following is not a complication of a pseudopancreatic cyst?

Malignancy. A **pseudopancreatic cyst** is a localized collection of fluid, pancreatic enzymes, and debris surrounded by a wall of fibrous or granulation tissue. Unlike true cysts, it lacks an epithelial lining. ### Why Malignancy is the Correct Answer The defining characteristic of a pseudocyst is the **absence of an epithelial lining**. Since there is no epithelium, there is no cellular substrate for neoplastic transformation. Therefore, a pseudocyst **never** undergoes malignant change. If a cystic lesion of the pancreas shows malignancy, it was likely a cystic neoplasm (like Mucinous Cystadenoma) from the outset, which can often be misdiagnosed as a pseudocyst. ### Explanation of Other Options (Complications) * **Infection:** This is a common complication where the cyst becomes an abscess, presenting with fever, leukocytosis, and worsening pain. * **Hemorrhage:** This occurs due to the erosion of the cyst into adjacent major vessels (most commonly the **Splenic Artery**), leading to a pseudoaneurysm or bleeding into the cyst cavity. * **Rupture:** The cyst can rupture into the peritoneal cavity (causing pancreatic ascites/peritonitis) or into hollow viscera like the stomach or duodenum. ### High-Yield Clinical Pearls for NEET-PG * **Timing:** Pseudocysts typically form **4–6 weeks** after an episode of acute pancreatitis. * **Most Common Site:** The **Lesser Sac**. * **Management:** Most (up to 50%) resolve spontaneously. Intervention (e.g., Cystogastrostomy) is indicated if the cyst is symptomatic, enlarging, or complicated. * **Gold Standard Diagnosis:** Contrast-Enhanced CT (CECT). * **Biochemical Marker:** High amylase levels in the cyst fluid help differentiate it from other cystic lesions.

Q: What is the best method for localizing an insulinoma?

Endoscopic ultrasonography with intra-operative palpation. **Explanation:** Insulinomas are the most common functional neuroendocrine tumors of the pancreas. They are typically small (<2 cm), solitary, and benign. Because of their small size, localization is the primary challenge in surgical management. **Why Option A is Correct:** The "gold standard" for localizing an insulinoma is a combination of **Endoscopic Ultrasonography (EUS)** pre-operatively and **Intra-operative Ultrasound (IOUS) with manual palpation** during surgery. * **EUS** has a high sensitivity (70–95%) for detecting small lesions in the head and body of the pancreas. * **Intra-operative palpation combined with IOUS** is the most definitive method, reaching a sensitivity of nearly 100%. Surgeons rely on the firm consistency of the tumor compared to the softer pancreatic tissue. **Analysis of Incorrect Options:** * **B & D (MRI and CECT):** While CECT (triple-phase) is often the first-line screening tool, its sensitivity for tumors <1 cm is relatively low (approx. 60%). MRI is slightly better but still inferior to EUS and IOUS. * **C (Selective retroperitoneal sonoendoscopy):** This is not a standard clinical term or procedure used for insulinoma localization. **High-Yield Clinical Pearls for NEET-PG:** 1. **Whipple’s Triad:** Symptoms of hypoglycemia during fasting, documented low blood glucose ( 3 μU/mL), elevated C-peptide (>0.6 ng/mL), and absence of sulfonylureas in urine. 3. **Medical Management:** Diazoxide is the drug of choice to inhibit insulin release before surgery. 4. **Surgical Management:** Enucleation is preferred for superficial tumors; distal pancreatectomy or Whipple’s procedure is reserved for deep-seated or large tumors.

Question 1

A 30-year-old known alcoholic patient presented with severe abdominal pain. On examination, a rigid abdomen is noted. The patient has a history of multiple episodes of abdominal pain over the last 4-5 years and has lost 5 kg of weight in the past 6 months. Serum lipase and amylase levels are normal. CECT abdomen was performed. What is the most likely diagnosis?

Accepted Answer

Chronic pancreatitis

Answer

Acute pancreatitis

Answer

Adenocarcinoma of pancreas

Answer

Periampullary carcinoma

Question 2

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

Accepted Answer

Insulinoma

Answer

Gastrinoma

Answer

Somatostatinoma

Answer

VIPoma

Question 3

A 40-year-old male presents with acute upper abdominal pain, shock, feeble pulse, and tachycardia. Examination reveals epigastric tenderness. Gastric aspiration shows no blood and provides relief. Abdominal X-ray is negative for free air under the diaphragm. Investigations show TLC 13,500, serum bilirubin 2.0 mg/dL, and serum amylase 800 IU/L. What is the most likely diagnosis?

Accepted Answer

Acute pancreatitis

Answer

Acute cholecystitis

Answer

Acute appendicitis

Answer

Acute hepatitis

Question 4

A patient presents with a three-day history of epigastric pain radiating to the back. Serum amylase levels are normal, but ultrasound of the abdomen reveals gall bladder stones and an enlarged pancreas. A CT scan confirms the diagnosis. Which of the following is the most likely diagnosis?

Accepted Answer

Acute Pancreatitis

Answer

Acute Cholecystitis

Answer

Acute Appendicitis

Answer

Acute Peritonitis

Question 5

What is the most common complication of chronic pancreatitis?

Accepted Answer

Pseudocyst

Answer

Ascites

Answer

Splenic vein thrombosis

Answer

Pancreatic enteric fistula

Question 6

A 60-year-old man with a history of heavy alcohol consumption presented with symptoms suggestive of acute pancreatitis that began 4 days ago. He continued to consume alcohol and was admitted for further evaluation. He is currently experiencing severe vomiting and complains of dizziness upon standing. Examination reveals epigastric and right hypochondrium tenderness, with a reddish discoloration noted in the flanks. Which of the following statements regarding the patient is most accurate?

Accepted Answer

Contrast CT scan of the abdomen will reveal severe necrotizing pancreatitis.

Answer

The patient should be evaluated for concomitant appendicitis.

Answer

Ultrasound is likely to demonstrate a pseudocyst of the pancreas.

Answer

Pancreatic calcification will be seen in an X-ray of the abdomen.

Question 7

Which of the following is not a complication of a pseudopancreatic cyst?

Accepted Answer

Malignancy

Answer

Rupture

Answer

Hemorrhage into cyst

Answer

Infection

Question 8

Serum amylase level is increased in all of the following conditions except?

Accepted Answer

Acute appendicitis

Answer

Intestinal obstruction

Answer

Perforated ulcer

Answer

Acute pancreatitis

Question 9

A 64-year-old man complains of abdominal pain, pruritus, 4-lb weight loss, and anorexia. There are multiple scratch marks on the skin of the extremities and flank. The bilirubin is 1.0 mg/dL. To determine if the condition is due to cholestasis, blood should be tested for which of the following?

Accepted Answer

Alkaline phosphatase

Answer

Direct and indirect bilirubin

Answer

Serum glutamic-oxaloacetic transaminase (SGOT)

Answer

Serum glutamic-pyruvic transaminase (SGPT)

Question 10

What is the best method for localizing an insulinoma?

Accepted Answer

Endoscopic ultrasonography with intra-operative palpation

Answer

MRI with dynamic CT

Answer

Selective retroperitoneal sonoendoscopy

Answer

Contrast-enhanced computed tomography

Pancreatic Surgery — MCQs

Pancreatic Surgery — MCQs

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