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Surgical aspects of hyperinsulinemic hypoglycemia
1Department of Surgery, Mayo Medical School, Rochester, Minnesota, USA.
Endocrinology and Metabolism Clinics of North America
|September 29, 1999
Summary
Diagnosing insulinoma involves identifying hypoglycemia with endogenous hyperinsulinemia. Surgical excision of these typically benign tumors offers a cure, profoundly impacting patient lives.
Area of Science:
- Endocrinology
- Surgical Oncology
- Gastroenterology
Background:
- Insulinoma, a rare pancreatic neuroendocrine tumor, presents with neuroglycopenic symptoms due to hypoglycemia.
- Accurate diagnosis relies on biochemical evidence of endogenous hyperinsulinemia during hypoglycemia.
Purpose of the Study:
- To outline diagnostic criteria for insulinoma.
- To discuss localization techniques and surgical management strategies.
- To highlight potential complications and long-term outcomes.
Main Methods:
- Diagnostic criteria include low glucose (<40 mg/dL), elevated insulin (6 µU/mL), high C-peptide (>200 pmol/L), and negative sulfonylurea screen.
- Localization methods discussed: preoperative ultrasound, arteriography, and intraoperative ultrasonography.
- Surgical approaches include enucleation and distal pancreatectomy; pancreatoduodenectomy is rarely needed.
Main Results:
- Insulinomas are typically benign, solitary, small, and firmer than surrounding pancreatic tissue.
- Surgical excision, particularly enucleation, is the primary treatment.
- Successful excision leads to long-term cure in most cases, except in MEN 1 syndrome.
Conclusions:
- A combination of clinical symptoms and biochemical tests confirms insulinoma diagnosis.
- Effective localization and surgical resection are crucial for successful treatment.
- While complications like pancreatic leakage can occur, surgical cure is achievable, significantly improving patient prognosis.