Updated strategies in the treatment of benign diseases-a patterns of care study of the german cooperative group on benign diseases.

Purpose: Radiation therapy (RT) is a common treatment for benign diseases in Germany. Because the treatment concepts are inconsistent, we conducted this pattern-of-care study on behalf of the German Cooperative Group on Benign Diseases to evaluate treatment standards in Germany.

Methods and materials: Questionnaires were mailed to all radiation therapy facilities in Germany. We assessed the treatment equipment, annual number of patients, treatment indications, and, in particular, treatment strategies in patients with benign diseases in 2014.

Results: We evaluated questionnaires returned by 116 participating institutions, of which 41 were ambulatory health care centers, 28 were private institutions, 27 were community hospitals, and 20 were university hospitals. On average, 2 linac accelerators and 2 megavoltage units were available in each institution. In 2014, a total of 36,830 patients were treated for benign diseases: 16,989 for degenerative diseases (peritendinitis humeroscapularis n = 2691; epicondylitis humeri n = 3788; heel spur n = 10,510); 14,936 for osteoarthritis (coxarthrosis n = 2230; gonarthrosis n = 2623; omarthrosis n = 2691; rhizarthrosis n = 2440; polyarthrosis n = 2297; others n = 2655); 1563 for hyperproliferative diseases (morbus Dupuytren n = 960; morbus Ledderhose n = 441; keloids n = 139; pterygium of the conjunctiva n = 3; other hyperproliferative diseases n = 20); 2440 for functional disorders (gynecomastia n = 843; Graves' disease n = 205; lymphatic fistula n = 178; heterotopic ossification prophylaxis n = 1214); 859 for stereotactic RT in the central nervous system (arteriovenous malformation n = 53; meningioma n = 425; acoustic neuroma n = 201; pituitary adenoma n = 131; others n = 49), and 43 for rare indications (pigmented villonodular synovitis n = 20 or vertebral hemangioma n = 23). The mean whole dose was <10 Gy in the treatment of degenerative disorders, 25 Gy for hyperproliferative diseases, 15 Gy for functional disorders, and <50 Gy for stereotactic RT.

Conclusions: In 2014, RT had an important role in the treatment of benign diseases. Because treatment concepts are inherent, we recommend treatment based on the guidelines written by the German Cooperative Group on Benign Diseases.