27th February 2025

A 23-year-old is concerned by a change in appearance of her right forearm and reports pain here at rest.

A 23-year-old is concerned by a change in appearance of her right forearm and reports pain here at rest. On examination, the right forearm appears somewhat larger in circumference than the left, without any soft tissue swelling present.

An X-ray is requested, which is shown below.

What is the most likely diagnosis?

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