A 50-year-old woman has experienced problems with the lesion on her left shin from about 10 years. The problem began after she fell and grazed her shin. The lesion had never healed and over the years shiny, reddish-brown and yellow patches had spread around the painful ulceration.

What could be the most probable diagnosis of this condition? *This image based case is from Docplexus editorial team for educative purpose only. Source: Haymarket