Pancreatic adenocarcinoma vs Pancreatic neuroendocrine tumor
How to tell Pancreatic adenocarcinoma and Pancreatic neuroendocrine tumor apart when a board question makes them look alike.
Adenocarcinoma is ductal obstruction and weight loss; neuroendocrine tumor is hormone syndrome or endocrine mass.
Side by side
Exocrine ductal malignancy with weight loss, painless jaundice when in pancreatic head, Courvoisier sign, and migratory thrombophlebitis.
Endocrine pancreatic tumor that may secrete hormones such as insulin, gastrin, glucagon, VIP, or somatostatin, or present as a well-circumscribed mass.
Malignant ductal epithelial cells invade locally and obstruct the bile duct when arising in the pancreatic head.
Neuroendocrine cells proliferate and may create hormone-excess syndromes depending on secreted peptide.
Pancreatic head mass with obstructive jaundice, weight loss, CA 19-9 support, or Trousseau syndrome supports adenocarcinoma.
Fasting hypoglycemia, refractory ulcers, watery diarrhea, necrolytic migratory erythema, or MEN1 association supports neuroendocrine tumor.
The trap
Both can be pancreatic masses, so symptoms from duct obstruction versus hormone excess separate them.
The repair move
For pancreatic tumors, decide whether the mass behaves like ductal obstruction or hormone secretion.
Try a free question
CoreAn older smoker has painless jaundice, weight loss, migratory thrombophlebitis, and a pancreatic head mass. Which diagnosis is most likely?
Show answer and explanation
Answer: A. Pancreatic adenocarcinoma. Pancreatic adenocarcinoma classically causes weight loss, painless jaundice when in the head, and can be associated with migratory thrombophlebitis.
Why the other choices are tempting
- B. Pancreatic neuroendocrine tumors often present with hormone syndromes or well-circumscribed endocrine masses.
- C. Chronic pancreatitis causes calcifications, steatorrhea, and diabetes after chronic injury.
- D. Insulinoma is a neuroendocrine tumor with fasting hypoglycemia.
- E. Acute cholecystitis causes RUQ pain, fever, and Murphy sign.
Flashcards
Tap a card to flip it.
What presentation favors pancreatic head adenocarcinoma?
Painless obstructive jaundice with weight loss points to ductal adenocarcinoma in the pancreatic head.
What vascular clue can accompany pancreatic adenocarcinoma?
Migratory thrombophlebitis, also called Trousseau syndrome, is a classic association.
Quick answers
What is the fastest way to tell Pancreatic adenocarcinoma from Pancreatic neuroendocrine tumor?
Adenocarcinoma is ductal obstruction and weight loss; neuroendocrine tumor is hormone syndrome or endocrine mass.
What is the key clue for Pancreatic adenocarcinoma?
Exocrine ductal malignancy with weight loss, painless jaundice when in pancreatic head, Courvoisier sign, and migratory thrombophlebitis.
What is the key clue for Pancreatic neuroendocrine tumor?
Endocrine pancreatic tumor that may secrete hormones such as insulin, gastrin, glucagon, VIP, or somatostatin, or present as a well-circumscribed mass.
What is the common trap with Pancreatic adenocarcinoma vs Pancreatic neuroendocrine tumor?
Both can be pancreatic masses, so symptoms from duct obstruction versus hormone excess separate them.