Pancreatic Surgery Practice Questions

Q: Match each of the following clinical conditions with its most appropriate diagnostic investigation: Clinical Condition Investigation A. Pancreatic pseudocyst 1. FNAC B. Thyroid nodule 2. MRCP C. Prostate cancer 3. PET scan D. Obstructive jaundice 4. CT scan Which of the following is the correct match?

A-4, B-1, C-3, D-2. ***A-4, B-1, C-3, D-2*** - **Pancreatic pseudocysts** are typically evaluated and characterized using **CT scanning (A-4)**, which provides excellent visualization of the collection and its relationship to surrounding structures. - **Thyroid nodules** are best evaluated for malignancy risk using fine-needle aspiration cytology (**FNAC**) (**B-1**), which remains the **gold standard** for diagnosis. - **Prostate cancer** staging or evaluation of recurrence/metastasis increasingly utilizes **PSMA-PET scanning (C-3)** for high sensitivity and specificity in detecting nodal or distant spread. - **Obstructive jaundice** requires detailed imaging of the biliary tree to determine the cause of obstruction, for which **magnetic resonance cholangiopancreatography (MRCP) (D-2)** is the investigation of choice. *A-3, B-1, C-4, D-2* - While **MRCP (D-2)** is correctly identified for obstructive jaundice, this option incorrectly pairs the **pancreatic pseudocyst** with a **PET scan (A-3)**, which is not the primary diagnostic modality for fluid collections. - It also mismatches **prostate cancer** with a **CT scan (C-4)** as the primary investigation, which is less sensitive than specialized functional imaging like PET for detecting small metastases. *A-2, B-1, C-4, D-3* - This option incorrectly identifies the diagnostic test for **obstructive jaundice** as a **PET scan (D-3)** rather than **MRCP**. - It also suggests a **CT scan (C-4)** for prostate cancer, which is inferior to **PET/MRI** imaging protocols for staging and disease assessment. *A-4, B-2, C-3, D-1* - This option incorrectly assigns **MRCP (B-2)** to the **thyroid**; MRCP is used for biliary anatomy, whereas **FNAC** is specific for thyroid nodules. - It incorrectly suggests **FNAC (D-1)** for the workup of **obstructive jaundice**, as FNAC is not a diagnostic tool for biliary anatomy or stone disease.

Q: What is the commonest cyst to arise in the pancreas after an attack of acute pancreatitis or pancreatic trauma?

Pseudocyst. **Explanation:** **1. Why Pseudocyst is Correct:** A **Pseudocyst** is the most common cystic lesion of the pancreas, accounting for approximately 75–80% of all pancreatic cysts. It typically develops as a complication of **acute pancreatitis** (occurring in about 10% of cases) or **pancreatic trauma**. Pathologically, it is a collection of amylase-rich fluid enclosed by a wall of **granulation or fibrous tissue**. Crucially, it lacks an epithelial lining, which is why it is termed a "pseudo" cyst. It usually takes 4–6 weeks to form after the initial inflammatory insult. **2. Why Other Options are Incorrect:** * **Serous Cyst (Serous Cystadenoma):** These are true primary neoplastic cysts lined by glycogen-rich cuboidal epithelium. They are usually benign ("grandmother tumor") and are not caused by inflammation or trauma. * **Mucinous Cyst (Mucinous Cystadenoma):** These are neoplastic cysts with malignant potential, typically found in the tail of the pancreas in middle-aged women. They are not secondary to pancreatitis. * **Malignant Cyst:** While some cysts (like Mucinous Cystadenocarcinoma) are malignant, they arise from neoplastic transformation rather than as a direct sequela of acute trauma or inflammation. **3. Clinical Pearls for NEET-PG:** * **Timing:** A pseudocyst requires **>4 weeks** to develop. Collections occurring 6 cm and persisting for >6 weeks. * **Gold Standard Investigation:** Contrast-Enhanced CT (CECT) is the investigation of choice.

Q: A chronic alcoholic presented with repeated episodes of non-bilious vomiting after meals. Based on CECT findings, what is the diagnosis?

Pseudocyst. ***Pseudocyst*** - A **pancreatic pseudocyst** is a common complication in **chronic alcoholics** following acute pancreatitis, characterized on CECT by a well-circumscribed **fluid collection** with a defined wall. - Large pseudocysts located in the **lesser sac** can exert external pressure on the stomach, leading to **gastric outlet obstruction** and subsequent **non-bilious vomiting**. *Gastric outlet obstruction* - This is a clinical syndrome rather than the primary diagnosis; while it explains the **non-bilious vomiting**, the CECT identifies the specific etiology as a **pseudocyst**. - Primary gastric causes like **peptic ulcer disease** or **gastric malignancy** would not typically present with the specific peripancreatic fluid findings seen in alcoholic patients. *Carcinoma pancreas* - **Carcinoma of the pancreas** typically presents as a **solid, hypoattenuating mass** on CECT, often causing the **double duct sign**. - Clinical features usually include **weight loss**, **painless jaundice**, and a palpable gallbladder (Courvoisier sign) rather than just repetitive vomiting. *Chronic pancreatitis* - While the patient is an alcoholic, **chronic pancreatitis** is characterized on CECT by **pancreatic calcifications**, **atrophy**, and **chain-of-lakes** ductal dilatation. - Although it is the underlying cause for pseudocyst formation, the specific finding of a compressing mass (pseudocyst) better explains the **acute presentation** of vomiting.

Q: Which branch of the portal vein is involved in chronic pancreatitis?

Splenic vein. **Explanation:** The correct answer is **D. Splenic vein**. **1. Why the Splenic Vein is Correct:** The splenic vein runs along the posterior surface of the body and tail of the pancreas. In chronic pancreatitis, persistent inflammation and peripancreatic fibrosis lead to compression or thrombosis of this vein (Splenic Vein Thrombosis). This results in **"Sinistral" (Left-sided) Portal Hypertension**. The blood is diverted through the short gastric veins into the gastric fundus, leading to isolated **gastric varices** while the liver function and esophageal veins often remain normal. **2. Why the Other Options are Incorrect:** * **A. Superior Mesenteric Vein (SMV):** While the SMV lies posterior to the neck of the pancreas, it is less commonly involved in the inflammatory process of chronic pancreatitis compared to the splenic vein. SMV involvement is more characteristic of pancreatic head malignancy. * **B. Inferior Mesenteric Vein (IMV):** The IMV usually drains into the splenic vein or the junction of the SMV and splenic vein. It is anatomically further from the primary site of pancreatic inflammation. * **C. Left branch of portal vein:** This is an intrahepatic structure or located at the porta hepatis, far from the pancreatic parenchyma affected by chronic pancreatitis. **3. Clinical Pearls for NEET-PG:** * **Classic Triad of Sinistral Hypertension:** Chronic pancreatitis + Splenic vein thrombosis + Gastric varices (with a normal liver). * **Treatment of Choice:** Splenectomy is the definitive treatment for symptomatic gastric varices due to splenic vein thrombosis. * **Puestow Procedure:** Often used in chronic pancreatitis with a dilated main pancreatic duct (>6mm); it involves a lateral pancreaticojejunostomy. * **Chain of Lakes Appearance:** A classic radiological finding in chronic pancreatitis on ERCP/MRCP due to alternating stenosis and dilatation of the pancreatic duct.

Q: Which of the following statements is NOT true regarding a pseudocyst of the pancreas?

Percutaneous aspiration is the treatment of choice.. **Explanation:** A pancreatic pseudocyst is a collection of fluid rich in pancreatic enzymes, enclosed by a wall of fibrous or granulation tissue (lacking a true epithelial lining). **Why Option D is the Correct Answer (The False Statement):** Percutaneous aspiration is **not** the treatment of choice because it is associated with a very high recurrence rate (over 70-90%) and a significant risk of introducing infection, converting a sterile pseudocyst into a pancreatic abscess. The treatment of choice for a symptomatic or complicated pseudocyst is **internal drainage** (e.g., cystogastrostomy), provided the cyst wall is "mature" (usually after 6 weeks). **Analysis of Other Options:** * **Option A:** Pseudocysts are frequently associated with persistently **elevated serum amylase** levels. If amylase remains high weeks after an episode of acute pancreatitis, a pseudocyst should be suspected. * **Option B:** The most common clinical presentation is an **epigastric mass** accompanied by pain, early satiety, or nausea due to the cyst's pressure on the stomach. * **Option C:** **Cystogastrostomy** (surgical or endoscopic) is considered an ideal treatment for cysts approximating the posterior wall of the stomach, as it allows internal drainage of the fluid. **NEET-PG High-Yield Pearls:** * **Definition:** A "pseudo" cyst lacks an epithelial lining (unlike true cysts). * **Timing:** Most pseudocysts require **6 weeks** for the wall to mature (become firm enough to hold sutures for internal drainage). * **Indications for Intervention:** Size >6 cm or persistence >6 weeks are traditional markers, but currently, intervention is primarily indicated if the cyst is **symptomatic** or **complicated** (infection, hemorrhage, or rupture). * **Investigation of Choice:** Contrast-Enhanced CT (CECT) scan.

Q: Which statement is NOT true regarding insulinoma?

Weight loss. **Explanation:** Insulinoma is the most common functional neuroendocrine tumor (NET) of the pancreas. The hallmark of this condition is the autonomous secretion of insulin, leading to recurrent episodes of hypoglycemia. **Why Weight Loss is NOT true:** In patients with insulinoma, **weight gain** is a classic clinical feature, not weight loss. This occurs for two reasons: 1. **Anabolic Effect:** Insulin is a potent anabolic hormone that promotes lipogenesis and glucose storage. 2. **Hyperphagia:** Patients frequently overeat or consume high-calorie sugary snacks to prevent or relieve the distressing symptoms of hypoglycemia. **Analysis of Incorrect Options:** * **A. Hypoglycemic attacks:** This is the primary clinical manifestation. It typically presents as **Whipple’s Triad**: (1) Symptoms of hypoglycemia during fasting/exercise, (2) Documented low blood glucose (<50 mg/dL), and (3) Relief of symptoms upon glucose administration. * **C. Usually solitary tumor:** Over 90% of insulinomas occur as a single, isolated lesion. Multiple tumors are rare and usually associated with **MEN-1 syndrome**. * **D. Mostly benign tumor:** Approximately 90% of insulinomas are benign and small (<2 cm). Only about 10% are malignant (indicated by local invasion or metastasis). **NEET-PG High-Yield Pearls:** * **Localization:** Most 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). * **Imaging:** Intraoperative ultrasound (IOUS) combined with surgical palpation is the most sensitive method for localization. * **Treatment:** Surgical enucleation is the treatment of choice for benign, solitary tumors. Medical management includes **Diazoxide** (inhibits insulin release).

Q: All of the following are known complications of pancreatitis except?

Pancreatic malignancy. **Explanation:** The correct answer is **C. Pancreatic malignancy**. While chronic pancreatitis is a significant risk factor for the eventual development of pancreatic adenocarcinoma, malignancy is considered a **sequela or long-term complication of chronic inflammation**, rather than a direct clinical complication of an episode of pancreatitis itself. **Analysis of Options:** * **Pancreatic Abscess (A):** This is a late complication of acute necrotizing pancreatitis, occurring typically 4+ weeks after the onset. It consists of a circumscribed collection of pus near the pancreas. * **Colonic Necrosis (B):** This is a rare but life-threatening complication. The spread of pancreatic enzymes (proteases and lipases) through the transverse mesocolon can cause fat necrosis, thrombosis of the mesenteric vessels, or direct enzymatic digestion of the colonic wall, leading to necrosis or perforation. * **Pancreatic Fistula (D):** This occurs due to disruption of the pancreatic duct (internal fistula leading to ascites/pleural effusion) or as a result of surgical/percutaneous drainage of a collection (external fistula). **NEET-PG High-Yield Pearls:** * **Most common cause of death in early pancreatitis:** Systemic Inflammatory Response Syndrome (SIRS) and Multi-Organ Dysfunction Syndrome (MODS). * **Most common cause of death in late pancreatitis (after 2 weeks):** Sepsis due to infected pancreatic necrosis. * **Sentinel Loop Sign:** Localized ileus of a jejunal loop seen on X-ray, indicating underlying pancreatitis. * **Cullen’s and Grey Turner’s signs:** Indicate retroperitoneal hemorrhage and are associated with severe necrotizing pancreatitis.

Q: What is the investigation of choice to detect gastrinoma less than 5 mm in size?

Endoscopic ultrasound. **Explanation:** The localization of gastrinomas (Zollinger-Ellison Syndrome) is challenging because they are often small ( 90%). Because the transducer is placed in close proximity to the pancreas and duodenum, it provides high-resolution images that can detect lesions as small as 2–3 mm. It is particularly superior for localizing tumors in the **head of the pancreas**. **Analysis of Incorrect Options:** * **B. Octreotide Scan (Somatostatin Receptor Scintigraphy):** While this is the investigation of choice for **initial global localization** and detecting metastases, its resolution is limited. It often fails to detect lesions smaller than 0.5–1 cm. * **C. CT Scan:** Triple-phase CT is commonly used but has low sensitivity (approx. 30-50%) for small gastrinomas, especially those under 1 cm. * **D. Portal Venous Sampling:** This is an invasive functional study used only when non-invasive imaging fails to localize the tumor. It helps in regionalization rather than precise anatomical localization. **High-Yield Clinical Pearls for NEET-PG:** * **Gastrinoma Triangle (Passaro’s Triangle):** Junction of cystic/common bile duct, junction of 2nd and 3rd parts of the duodenum, and neck/body of the pancreas. 90% of gastrinomas are found here. * **Most common site:** Duodenum (more common than the pancreas). * **Best Initial Test:** Serum Gastrin levels (>1000 pg/mL is diagnostic). * **Screening:** Always screen for **MEN-1 syndrome** in patients with gastrinoma. * **Selective Arterial Secretagogue Injection (SASI) test:** Currently the most sensitive functional test for localization if EUS/SRS are negative.

Q: Which of the following best assesses the severity of pancreatitis?

Ranson Score. ### Explanation **Correct Answer: C. Ranson Score** The severity of acute pancreatitis is determined by the degree of systemic inflammatory response and organ dysfunction, rather than the magnitude of enzyme elevation. The **Ranson Criteria** is a classic clinical scoring system used to predict the severity and mortality of acute pancreatitis. It assesses 5 parameters at admission and 6 parameters at 48 hours. A score of ≥3 indicates severe pancreatitis, while a score of ≥7 indicates a mortality rate of nearly 50%. **Why other options are incorrect:** * **A. Serial serum amylase levels:** Amylase is a diagnostic marker, not a prognostic one. The absolute level of serum amylase does not correlate with the clinical severity or the extent of pancreatic necrosis. * **B. Stool trypsin levels:** This is primarily used to assess pancreatic exocrine insufficiency (e.g., in chronic pancreatitis or cystic fibrosis), not the acute severity of an inflammatory episode. * **C. Development of ARDS:** While ARDS is a sign of severe systemic involvement (organ failure), it is a *complication* of the disease rather than a comprehensive assessment tool. Scoring systems like Ranson or APACHE II are preferred for overall risk stratification. **High-Yield Clinical Pearls for NEET-PG:** * **Ranson Criteria at Admission (GALAW):** **G**lucose >200, **A**ge >55, **L**DH >350, **A**ST >250, **W**BC >16,000. * **Most sensitive imaging for severity:** Contrast-Enhanced CT (CECT) performed after 72 hours (Balthazar Scoring). * **Most accurate scoring system:** APACHE II (can be used at any time, unlike Ranson). * **Single best laboratory marker for severity:** C-Reactive Protein (CRP) >150 mg/L at 48 hours.

Question 1

Match each of the following clinical conditions with its most appropriate diagnostic
investigation:

Clinical Condition Investigation

A. Pancreatic pseudocyst 1. FNAC

B. Thyroid nodule 2. MRCP

C. Prostate cancer 3. PET scan

D. Obstructive jaundice 4. CT scan

Which of the following is the correct match?

Accepted Answer

A-4, B-1, C-3, D-2

Answer

A-3, B-1, C-4, D-2

Answer

A-2, B-1, C-4, D-3

Answer

A-4, B-2, C-3, D-1

Question 2

Pancreatic pseudocyst most commonly occurs after which condition?

Accepted Answer

Pancreatitis

Answer

Trauma

Answer

Pancreatic surgery

Answer

Pancreatic malignancy

Question 3

What is the commonest cyst to arise in the pancreas after an attack of acute pancreatitis or pancreatic trauma?

Accepted Answer

Pseudocyst

Answer

Serous cyst

Answer

Mucinous cyst

Answer

Malignant cyst

Question 4

A chronic alcoholic presented with repeated episodes of non-bilious vomiting after meals. Based on CECT findings, what is the diagnosis?

Accepted Answer

Pseudocyst

Answer

Gastric outlet obstruction

Answer

Carcinoma pancreas

Answer

Chronic pancreatitis

Question 5

Which branch of the portal vein is involved in chronic pancreatitis?

Accepted Answer

Splenic vein

Answer

Superior mesenteric vein

Answer

Inferior mesenteric vein

Answer

Left branch of portal vein

Question 6

Which of the following statements is NOT true regarding a pseudocyst of the pancreas?

Accepted Answer

Percutaneous aspiration is the treatment of choice.

Answer

It is associated with an increase in amylase levels.

Answer

It can present as an epigastric mass.

Answer

Cystogastrostomy is an ideal treatment.

Question 7

Which statement is NOT true regarding insulinoma?

Accepted Answer

Weight loss

Answer

Hypoglycemic attacks

Answer

Usually solitary tumor

Answer

Mostly benign tumor

Question 8

All of the following are known complications of pancreatitis except?

Accepted Answer

Pancreatic malignancy

Answer

Pancreatic abscess

Answer

Colonic necrosis

Answer

Pancreatic fistula

Question 9

What is the investigation of choice to detect gastrinoma less than 5 mm in size?

Accepted Answer

Endoscopic ultrasound

Answer

Octreotide scan

Answer

CT scan

Answer

Portal venous sampling

Question 10

Which of the following best assesses the severity of pancreatitis?

Accepted Answer

Ranson Score

Answer

Serial serum amylase levels

Answer

Stool trypsin levels

Answer

Development of ARDS

Pancreatic Surgery — MCQs

Pancreatic Surgery — MCQs

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