What is the prevalence of Insulinoma?

Insulinoma is a rare neuroendocrine tumor of the pancreas with an estimated annual incidence of approximately 1 to 4 cases per million people. While it is considered a rare disease, true prevalence is difficult to determine due to potential underdiagnosis of patients experiencing chronic, unexplained hypoglycemic symptoms.

How common is Insulinoma?

Insulinoma is classified as a rare condition. Because it often mimics other metabolic or neurological disorders, many patients face a significant diagnostic delay, meaning the actual number of people living with Insulinoma may be higher than current clinical literature suggests. Data from the DiseaseMaps.org community reflects this, with 15 members currently sharing their lived experiences with the condition, highlighting the importance of patient-led data in rare disease research.

What are the demographic patterns of Insulinoma?

The clinical presentation and epidemiology of Insulinoma show distinct trends:

• Age of onset: While it can occur at any age, Insulinoma is most frequently diagnosed in adults between the ages of 30 and 60.


• Gender distribution: Most clinical studies indicate that Insulinoma affects males and females at roughly equal rates, though some cohorts suggest a slight female predominance.


• Genetic factors: While the vast majority are sporadic, approximately 5% to 10% of Insulinoma cases are associated with Multiple Endocrine Neoplasia type 1 (MEN1) syndrome, which has a clear hereditary component.

Why is accurate prevalence data challenging to obtain?

The primary challenge in tracking Insulinoma is its low incidence combined with a symptom profile—such as fasting hypoglycemia, confusion, and palpitations—that is frequently misdiagnosed as epilepsy, psychiatric disorders, or other metabolic conditions. Because Insulinoma requires specialized biochemical testing (such as the 72-hour fast) for confirmation, many cases likely remain undetected in the general population.

Next steps

• Consult an endocrinologist if you experience persistent symptoms of Whipple's triad (hypoglycemia symptoms, low blood glucose, and relief after glucose intake).


• Connect with the 15 members of the DiseaseMaps.org community to share experiences and coping strategies.


• Request a referral to a center of excellence specializing in neuroendocrine tumors if Insulinoma is suspected.

Medical disclaimer: This content is for informational purposes only and does not constitute medical advice, diagnosis, or treatment; always seek the advice of your physician regarding a medical condition.

References

• Orphanet: Insulinoma (ORPHA:472)


• NIH Genetic and Rare Diseases Information Center (GARD): Insulinoma


• OMIM: Multiple Endocrine Neoplasia, Type I (MEN1)


• National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)