en عمومى General گزارش مورد case report Congenital RadioulnarSynostosisis a bony connection between the radius and ulna. In 1793 for the first time Sandifort explained the initial description of congenital radialulnarsynostosis[1,2]. The condition may be unilateral or bilateral that is more common. Functional defects associated with the anomaly depend on the severity of the deformity and on whether or not it is bilateral[3,4,5]. The condition may associate with other abnormalities and syndromes but we didn’t find in our patient any of them[6-11]. Important view of this manuscript was rarity of this anomaly and also in patient opinion is unimportant disturbance that caused him didn’t refer to specialist since long past. factors, Radioulnar Synostosis, Congenital, bony connection 0 0 http://intjmi.com/browse.php?a_code=A-10-1-48&slc_lang=en&sid=1 Mohamadhosseinkariminasab 1003194753284600625 1003194753284600625 No Assistant professor of Mazanadaran university of medical science, orthopaedic department, imam Khomeini hospital MasoudShayeste-Azar 1003194753284600626 1003194753284600626 No Associate professor of Mazanadaranuniversity of medical science, orthopaedic department, imam Khomeini hospital MajidSajjadisaravi 1003194753284600627 1003194753284600627 No Assistant professor of Mazanadaran university of medical science, orthopaedic department, imam Khomeini hospital SeyedMohamad Mehdi Daneshpoor 1003194753284600628 1003194753284600628 Yes Orthopaedic resident, Mashhad university of medical science, orthopaedic department, emamreza hospital shadiShayeste-Azar 1003194753284600629 1003194753284600629 No medical student,Mazanadaranuniversity of medical science