Pancreatitis

Pancreatitis US Medical PG Question 1: A 55-year-old man is brought to the emergency room by his roommate due to an abdominal pain that started 2 hours ago. His pain is dull, aching, and radiates to the back. He admits to binge drinking alcohol for the past 2 days. Past medical history is significant for multiple admissions to the hospital for similar abdominal pain events, hypertension, and hyperlipidemia. He takes chlorthalidone and atorvastatin. He admits to heavy alcohol consumption over the past 10 years. He has smoked a pack of cigarettes a day for the last 20 years. In the emergency department, his temperature is 38.9℃ (102.0℉), pulse rate is 100/min, and respiratory rate is 28/min. On physical examination, he looks generally unwell and diaphoretic. Auscultation of his heart and lungs reveals an elevated heart rate with a regular rhythm. His lungs are clear to auscultation bilaterally. His abdomen is tympanitic with generalized tenderness. Evaluation of lab values reveals a leukocyte count of 28,000/mm3 with 89% of neutrophils. His amylase level is 255 U/L. A CT scan of the abdomen shows the diffuse enlargement of the pancreas. Which pathological process is most likely occurring in this patient’s peripancreatic tissue?

• A. Fat necrosis (Correct Answer)
• B. Caseous necrosis
• C. Fibrinoid necrosis
• D. Coagulative necrosis
• E. Liquefactive necrosis

Pancreatitis Explanation: ***Fat necrosis*** - This patient presents with **acute pancreatitis**, characterized by severe epigastric pain radiating to the back, elevated amylase, and diffuse pancreatic enlargement on CT, all exacerbated by **binge drinking**. - In acute pancreatitis, activated pancreatic enzymes, particularly **lipases**, leak into the peripancreatic fat, causing enzymatic breakdown of fat into fatty acids, which then combine with calcium to form **calcium soaps** (saponification), clinically recognizable as fat necrosis. *Caseous necrosis* - This type of necrosis is typically associated with **tuberculosis** and fungal infections, forming a cheesy, crumbly appearance. - It involves a granulomatous inflammatory response and does not align with the enzyme-driven fat breakdown seen in pancreatitis. *Fibrinoid necrosis* - This is a vascular injury characterized by the deposition of **fibrin-like material** in arterial walls, often seen in immune-mediated vasculitis or severe hypertension. - It is not a primary pathological process in the peripancreatic tissue during acute pancreatitis. *Coagulative necrosis* - This form of necrosis is characteristic of **ischemic injury** in most solid organs (e.g., heart, kidney) where the cellular architecture is preserved for some time. - While pancreatic necrosis can occur, the specific breakdown of peripancreatic fat by lipases leads to fat necrosis, not coagulative necrosis of the fat itself. *Liquefactive necrosis* - This type of necrosis occurs in tissues rich in hydrolytic enzymes and low in structural proteins, such as the **brain after ischemia** or in **abscesses**. - While pancreatic tissue undergoing severe necrosis can exhibit liquefaction, the specific process affecting the surrounding fat in pancreatitis is fat necrosis due to lipase activity.

Pancreatitis US Medical PG Question 2: A 52-year-old woman presents to the urgent care center with several hours of worsening abdominal discomfort with radiation to the back. The patient also complains of malaise, chills, nausea, and vomiting. Social history is notable for alcoholism. On physical exam, she is febrile to 39.5°C (103.1°F), and she is diffusely tender to abdominal palpation. Complete blood count is notable for 13,500 white blood cells, bilirubin 2.1, lipase 842, and amylase 3,210. Given the following options, what is the most likely diagnosis?

• A. Choledocholithiasis
• B. Ascending cholangitis
• C. Gallstone pancreatitis (Correct Answer)
• D. Cholelithiasis
• E. Acute cholecystitis

Pancreatitis Explanation: ***Gallstone pancreatitis*** - The patient presents with classic symptoms of **acute pancreatitis**: severe abdominal pain radiating to the back, nausea, vomiting, and markedly elevated **lipase (842)** and **amylase (3,210)**. - The **key differentiating feature** is the elevated **bilirubin (2.1 mg/dL)**, which indicates biliary obstruction from a gallstone passing through or obstructing the ampulla of Vater. - **Gallstone pancreatitis** is the most common cause of acute pancreatitis in women, and the combination of pancreatitis with hyperbilirubinemia strongly suggests a biliary etiology rather than alcoholic pancreatitis (which typically does not cause elevated bilirubin). - While the patient has a history of alcoholism, the elevated bilirubin makes **gallstone pancreatitis** the most likely diagnosis. *Choledocholithiasis* - This refers to a stone in the **common bile duct**, which can cause biliary obstruction and elevated bilirubin. - However, choledocholithiasis alone does not explain the **markedly elevated lipase and amylase**, which indicate pancreatic inflammation. - Choledocholithiasis may be present as part of the pathophysiology, but the clinical picture is acute pancreatitis caused by the stone (gallstone pancreatitis). *Ascending cholangitis* - This serious bile duct infection presents with **Charcot's triad** (fever, jaundice, right upper quadrant pain) or **Reynolds' pentad** (adds altered mental status and hypotension). - While the patient is febrile, she lacks **jaundice**, hypotension, or altered mental status. - The **extremely elevated lipase and amylase** point to pancreatitis rather than cholangitis as the primary process. *Cholelithiasis* - This simply means **gallstones in the gallbladder**, which are often asymptomatic. - The patient's acute presentation with fever, systemic symptoms, and markedly elevated pancreatic enzymes indicates a complication of gallstones (pancreatitis), not just their presence. *Acute cholecystitis* - This is **gallbladder inflammation**, typically presenting with right upper quadrant pain, fever, positive Murphy's sign, and leukocytosis. - The **diffuse abdominal tenderness** (not localized to RUQ), pain radiating to the back, and **extremely elevated lipase and amylase** are characteristic of pancreatitis, not cholecystitis. - Acute cholecystitis does not cause such dramatic elevations in pancreatic enzymes.

Pancreatitis US Medical PG Question 3: A 72-year-old woman comes to the emergency department because of upper abdominal pain and nausea for the past hour. The patient rates the pain as an 8 to 9 on a 10-point scale. She has had an episode of nonbloody vomiting since the pain started. She has a history of type 2 diabetes mellitus, hypertension, and osteoporosis. The patient has smoked 2 packs of cigarettes daily for 40 years. She drinks 5–6 alcoholic beverages daily. Current medications include glyburide, lisinopril, and oral vitamin D supplements. Her temperature is 38.5°C (101.3°F), pulse is 110/min, and blood pressure is 138/86 mm Hg. Examination shows severe epigastric tenderness to palpation with guarding but no rebound. Ultrasonography of the abdomen shows diffuse enlargement of the pancreas; no gallstones are visualized. The patient is admitted to the hospital for pain control and intravenous hydration. Which of the following is the most appropriate next step in the management of this patient’s pain?

• A. Oral gabapentin every 24 hours
• B. Transdermal fentanyl every 72 hours
• C. Oral acetaminophen every 6 hours
• D. Patient-controlled intravenous hydromorphone (Correct Answer)
• E. Transdermal bupivacaine on request

Pancreatitis Explanation: ***Patient-controlled intravenous hydromorphone*** - This patient presents with **acute pancreatitis**, characterized by severe epigastric pain, nausea, vomiting, fever, and findings indicative of pancreatic inflammation (enlarged pancreas on ultrasound, guarding without rebound). **Opioids**, such as hydromorphone, are the mainstay for **severe pain relief** in acute pancreatitis. - **Patient-controlled analgesia (PCA)** with intravenous opioids allows the patient to self-administer small, frequent doses, providing optimal pain control while minimizing the risk of over-sedation, making it suitable for managing **acute severe pain**. *Oral gabapentin every 24 hours* - **Gabapentin** is primarily used for **neuropathic pain** or as an adjunct for chronic pain, not typically for acute severe visceral pain like that seen in acute pancreatitis. - Its **oral route** and every 24-hour dosing schedule are too slow and infrequent for rapid pain control in an emergency setting with severe pain. *Transdermal fentanyl every 72 hours* - **Transdermal fentanyl** is indicated for **chronic severe pain** that requires continuous opioid administration and is not suitable for the rapid onset and fluctuating intensity of acute pancreatitis pain. - The **transdermal route** and long dosing interval mean it would not provide immediate or adequate pain relief for a patient experiencing pain rated 8-9/10. *Oral acetaminophen every 6 hours* - **Acetaminophen** is a non-opioid analgesic generally used for **mild to moderate pain** and fever control. It is insufficient for the severe pain experienced in acute pancreatitis. - The **oral route** takes longer to achieve therapeutic levels and may be limited by the patient's nausea and vomiting. *Transdermal bupivacaine on request* - **Bupivacaine** is a **local anesthetic** typically used for regional anesthesia or nerve blocks, not for systemic management of acute visceral pain like pancreatitis. - **Transdermal application** of bupivacaine is not a standard or effective method for managing widespread, severe abdominal pain and would not provide adequate relief.

Pancreatitis US Medical PG Question 4: A 51-year-old homeless man presents to the emergency department with severe abdominal pain and cramping for the past 3 hours. He endorses radiation to his back. He adds that he vomited multiple times. He admits having been hospitalized repeatedly for alcohol intoxication and abdominal pain. His temperature is 103.8° F (39.8° C), respiratory rate is 15/min, pulse is 107/min, and blood pressure is 100/80 mm Hg. He refuses a physical examination due to severe pain. Blood work reveals the following: Serum: Albumin: 3.2 gm/dL Alkaline phosphatase: 150 U/L Alanine aminotransferase: 76 U/L Aspartate aminotransferase: 155 U/L Gamma-glutamyl transpeptidase: 202 U/L Lipase: 800 U/L What is the most likely diagnosis of this patient?

• A. Duodenal peptic ulcer
• B. Choledocholithiasis
• C. Pancreatitis (Correct Answer)
• D. Cholecystitis
• E. Gallbladder cancer

Pancreatitis Explanation: ***Pancreatitis*** - The patient's history of **repeated alcohol intoxication** and abdominal pain, combined with **severe abdominal pain radiating to the back**, vomiting, and significantly elevated **lipase (800 U/L)**, are highly indicative of **acute pancreatitis**. - The elevated **liver enzymes (ALT, AST, GGT)** and **alkaline phosphatase** can be associated with cholestasis or liver involvement often seen in alcohol-induced pancreatitis or can be elevated due to a gallstone lodged in the common bile duct, which is also a common cause of pancreatitis. *Duodenal peptic ulcer* - While duodenal ulcers cause severe abdominal pain, they typically present with **epigastric pain** that may be relieved by food, and often cause **melena or hematemesis** if bleeding. - The extremely high **lipase level** and pain radiating to the back are not characteristic of an uncomplicated duodenal ulcer. *Choledocholithiasis* - **Choledocholithiasis** (gallstones in the common bile duct) can cause severe right upper quadrant or epigastric pain and elevated liver enzymes, but it doesn't typically present with an isolated, dramatically high **lipase** level without concomitant pancreatitis. - The main symptom is **biliary colic**, often post-prandial, and usually involves jaundice or cholangitis if infected. *Cholecystitis* - **Cholecystitis** presents with **right upper quadrant pain**, often radiating to the shoulder, associated with fever and nausea, and is usually triggered by fatty meals. - Although there might be some elevation in liver enzymes and amylase/lipase, the **markedly elevated lipase** and pain radiating to the back are more suggestive of pancreatitis. *Gallbladder cancer* - **Gallbladder cancer** typically presents with more insidious symptoms, such as chronic right upper quadrant pain, weight loss, jaundice, and anorexia. - It would not usually present with an acute episode of **severe abdominal pain and drastically high lipase** in this manner.

Pancreatitis US Medical PG Question 5: A 29-year-old woman presents with a 2-hour history of sudden onset of severe mid-epigastric pain. The pain radiates to the back, and is not relieved by over-the-counter antacids. The patient also complains of profuse vomiting. The patient’s medical history is negative for similar symptoms. She consumes 3–4 alcoholic drinks daily. The blood pressure is 80/40 mm Hg and the heart rate is 105/min. Examination of the lungs reveals bibasilar crackles. Abdominal examination reveals diffuse tenderness involving the entire abdomen, marked guarding, rigidity, and reduced bowel sounds. The chest X-ray is normal. However, the abdominal CT scan reveals peritoneal fluid collection and diffuse pancreatic enlargement. The laboratory findings include: Aspartate aminotransferase 63 IU/L Alkaline phosphatase 204 IU/L Alanine aminotransferase 32 IU/L Serum amylase 500 IU/L (Normal: 25-125 IU/L) Serum lipase 1,140 IU/L (Normal: 0-160 IU/L) Serum calcium 2 mmol/L Which of the following cellular changes are most likely, based on the clinical and laboratory findings?

• A. Liquefactive necrosis
• B. Dry gangrene
• C. Caseous necrosis
• D. Coagulative necrosis
• E. Fat necrosis (Correct Answer)

Pancreatitis Explanation: ***Fat necrosis*** - The patient's presentation with severe epigastric pain radiating to the back, elevated serum amylase and lipase, **alcohol abuse**, and diffuse pancreatic enlargement indicates **acute pancreatitis**. - **Fat necrosis** is a characteristic pathologic finding in acute pancreatitis, resulting from the release of activated pancreatic enzymes (like lipase) into the surrounding adipose tissue, causing **FFA (free fatty acid)** formation that complexes with calcium (saponification). *Liquefactive necrosis* - This type of necrosis is characterized by the complete digestion of dead cells, resulting in a **viscous liquid mass**. - It is typically seen in **bacterial infections** or **cerebral infarcts**, not primarily in pancreatitis. *Dry gangrene* - **Dry gangrene** involves ischemic necrosis, usually affecting the extremities, where the tissue becomes **dry, shrunken, and black**. - It is caused by **lack of blood supply** and does not fit the clinical picture of acute pancreatitis. *Caseous necrosis* - **Caseous necrosis** is a distinct form of coagulative necrosis, characterized by a **cheese-like appearance** of the necrotic tissue. - It is most commonly associated with **tuberculosis** and certain fungal infections, not acute pancreatitis. *Coagulative necrosis* - **Coagulative necrosis** is characterized by the preservation of the cell shape and tissue architecture for several days after cell death, often due to **ischemia** (e.g., myocardial infarction). - While pancreatic cells can undergo coagulative necrosis in severe ischemia, **fat necrosis** is specifically and prominently associated with the enzymatic destruction in acute pancreatitis.

Pancreatitis Flashcard 1 of 5

Question: Chronic pancreatitis may present with _____, which results in malabsorption with steatorrhea and fat-soluble vitamin deficiences

Answer: pancreatic insufficiency

Pancreatitis Flashcard 2 of 5

Question: Chronic pancreatitis is most often secondary to recurrent acute _____

Answer: pancreatitis

Pancreatitis Flashcard 3 of 5

Question: Which pancreatic enzyme (amylase or lipase) is more specific for acute pancreatitis?_____

Answer: Lipase

Pancreatitis Flashcard 4 of 5

Question: Pancreatic insufficiency is associated with _____ excretion of fecal elastase

Answer: decreased

Pancreatitis Flashcard 5 of 5

Question: What endocrine pathology may arise secondary to chronic pancreatitis? _____

Answer: Diabetes mellitus