8th June 2025

A 48-year-old woman with type 2 diabetes has had multiple skin lesions on her back over the last 3 months.

A 48-year-old woman with type 2 diabetes has had multiple skin lesions on her back over the last 3 months. There can be up to 15 at a time. They are sometimes sore but not itchy. They come and go, and do not leave scars. A typical lesion is shown in the image. 

Which is the most appropriate investigation?

Select the SINGLE most appropriate option from the list below. Select ONE option only.