The family's lawyer, Antoine Fittante, confirms it is the man's leg.
"Each scar is specific, unique. This man also has burn marks on the other leg, it's very clear. An expert will have no trouble identifying the image.
"It's rather incredible that a person finds themselves without their agreement on cigarette packets throughout the European Union," Mr Fittante said.
"My client feels betrayed, wounded in his dignity, by seeing his disability [displayed] on cigarette packets in tobacconists; one must admit that's not very pleasant."
Fittante has written to the hospital, to find out how the photos ended up being used.
The European Commission has been contacted as it is responsible for the distribution of such images on all EU cigarette packets.
Fittante says the commission normally uses pictures from a database, which are verified and published with the consent of the person featured.