Squamous cell carcinoma of skin developing in a skin graft donor site

We report a case of squamous cell carcinoma of the skin of the right ring finger which was treated by excision and split skin grafting. Three months later the patient presented with a further lesion at the margin of the skin graft donor site on the right thigh. Excision biopsy of this second lesion revealed a squamous cell carcinoma of a similar pathological appearance to the original lesion. We have been unable to trace any previous similar reports. A possible pathological basis for the sequence of events is discussed.