* Benign tumor of adrenal medulla * Excess epinephrine and norepinephrine * Hypertension, tachycardia, palpitations, severe headaches, sweating, flushing of the face, and muscle spasms
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**Hypersecretion**
* Hyperinsulinism
Hypoglycemia, convulsions, fainting
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Hyposecretion
* Diabetes mellitus:
* Lack of insulin secretion or resistance of insulin in promoting sugar, starch, and fat metabolism in cells
* Type 1 : childhood onset, typically can occur in adulthood * Type 2 : adult onset, typically