app. 20cm x 10cm, almost circular
The patient hast chronic recurrent ulcers of the lower leg on the left tibial edge.
Therapeutic approach: high-dose pain treatment, compression bandages several times a day, crossectomy and stripping surgery.
The complete case of this picture series can be found here.
See also:
Ulcer app. 12 cm x 3 cm (5)
After 3 days of compression therapy (7)