Exposed irradiated joints are characterized by bone and cartilage necrosis with a chronically infected joint space. The indication for treatment results from possible infection spreading and more often because of severe pain. The usual concept of sequential debridement, joint replacement and regional flap coverage, is often impossible due to the radiodermitis and bone necrosis in the neighbourhood of the joint. Even free flaps are associated with a higher failure rate, because of the irradiation of the recipient vessels long vein grafts are often needed. If regional flap coverage is desired, distant flaps with long, not irradiated pedicles must be chosen. Prevention due to special considerations during the first surgery is essential.