Twenty five yrs old male patient had sweating, palpitations and found to have blood sugar of 45 mg/dl. Multiple similar episodes had been recorded in the past, corrected with glucose. Nurse caring for this patient should consider which one of the following diagnosis?

1. A

   VIPoma

2. B

   Insulinoma

3. C

   Gastrinoma

4. D

   Glucagonoma

Appeared in: JIPMER Nursing Officer-2017

Explanation

• The patient's signs and symptoms—sweating, palpitations, and low blood sugar (45 mg/dL) that resolves with glucose—perfectly match Whipple's triad.
• Whipple's triad is the classic diagnostic criteria for an insulinoma, a pancreatic tumor that secretes excess insulin.
• The excess insulin causes blood glucose levels to drop, leading to hypoglycemic episodes.
• The sweating and palpitations are autonomic responses to the dangerously low blood sugar.

Why Other Options Were Wrong

• Option A: A VIPoma secretes Vasoactive Intestinal Peptide (VIP), leading to a syndrome known as WDHA (Watery Diarrhea, Hypokalemia, Achlorhydria). It does not cause hypoglycemia.
• Option C: A gastrinoma secretes excess gastrin, causing Zollinger-Ellison syndrome. This syndrome is characterized by severe, recurrent peptic ulcers and acid reflux, not hypoglycemia.
• Option D: A glucagonoma is a tumor that secretes glucagon. Glucagon's function is to raise blood sugar levels. Therefore, a glucagonoma leads to hyperglycemia (high blood sugar) and often mild diabetes, not hypoglycemia.

Related Visual

Clinical Relevance

• Nursing practice connection: Use the key finding related to Differential diagnosis of pancreatic neuroendocrine tumors based on clinical presentation to guide bedside assessment, documentation, and the next nursing action.
• Nurses play a crucial role in identifying Whipple's triad at the bedside by accurately monitoring symptoms, checking blood glucose during an episode, and documenting the response to treatment.
• For a patient with suspected insulinoma, a key nursing responsibility is preparing for and monitoring a 72-hour fast, which is the gold-standard diagnostic test. This involves frequent glucose checks and close observation for neuroglycopenic symptoms.
• Patient safety is paramount. The nurse must implement seizure precautions and ensure immediate access to IV dextrose and glucagon, as severe hypoglycemia can be life-threatening.

How to Approach the Question

• First, analyze the clinical vignette to identify the core signs and symptoms: sweating, palpitations, low blood sugar (45 mg/dl), and relief with glucose.
• Recognize this cluster of findings as the classic Whipple's triad.
• Next, recall the pathophysiology of the options provided. Each option is a type of pancreatic neuroendocrine tumor.
• Evaluate each option based on the hormone it secretes and its effect on blood glucose.
• Insulinoma secretes insulin, which lowers blood sugar, matching the patient's hypoglycemia.
• VIPoma, Gastrinoma, and Glucagonoma cause distinct syndromes (diarrhea, ulcers, hyperglycemia, respectively) that do not fit the patient's presentation.

Concept Tested & Keywords

• Concept Tested: Differential diagnosis of pancreatic neuroendocrine tumors based on clinical presentation.
• Stem keywords: sweating, palpitations, blood sugar 45 mg/dl, corrected with glucose, recurrent episodes
• Lead-in keywords: consider which one
• Clinical cues: The combination of neurogenic symptoms (sweating, palpitations), documented hypoglycemia (45 mg/dl), and relief with glucose points towards Whipple's triad.
• Clinical cues: The recurrent nature of the episodes suggests an underlying chronic condition causing unregulated hormone secretion.

Question ID

Q8UZCZPTn5nmgLugLsZps6

Copy ID

Reference Book

E6 Medicine Davidson Principles Practice 24e p. 697-699

E6 Medicine Harrison 22e Part 1 p. 720-722

E6 Medicine Harrison 22e Part 2 p. 1139-1141