en Orthopedic Surgery Orthopedic Surgery case report case report <p>  Radial polydactyly, the most common digital duplication in Asian and white populations, has a wide range of manifestations. Its classification is useful for planning and assessing surgical treatment. Our patient had four thumbs, duplicated radial carpal bones, and a bifurcated radius. This presentation is not covered by any of the current classifications. To the best of our knowledge, this is the first case of such characteristics reported to date. Consequently, we propose some modifications in the nomenclature and classification of radial polydactyly. </p><p>  </p> Radial polydactyly, Triphalangeal thumb, Tetraplication of the thumb. 507 512 http://mjiri.iums.ac.ir/browse.php?a_code=A-10-1-710&slc_lang=en&sid=1 Alireza Jalili Alirezajalili.Jalili@gmail.com 200319475328460012666 200319475328460012666 Yes Hand Surgery Department, Hormozgan University of Medical Sciences, Mohammadi Hospital, Bandar Abbas, Iran. Farid Najd Mazhar fnajdmazhar@yahoo.com 200319475328460012667 200319475328460012667 No Hand Surgery Department, Iran University of Medical Sciences, Tehran, Iran.