Vaccination scar with soft-tissue atrophy restored by local insulin treatment.

A woman who had a deep scar on her left arm as a result of an influenza vaccination was treated with insulin. Monocomponent porcine insulin was injected into each quadrant of the pit. After 82 days' treatment her arm appeared normal and has remained so over seven months. Using insulin's ability to promote fat and protein synthesis is a simple and effective way of treating atrophied scars.