en جراحی دست / آرنج Hand surgery / Elbow گزارش مورد Case Report <div style="text-align: justify;"><span style="font-size:14px;"><span style="font-family:Tahoma;"><span style="line-height:2;"><span new="" roman="" times="">Ganglion cysts are the most common type of soft tissue tumors in the hands and wrists. When presented in rare locations, they may cause diagnostic and therapeutic challenges. In this report, we presented a case of a ganglion cyst in the thenar muscle of a 25-year-old woman, which was located adjacent to the recurrent branch of the median nerve. It was removed with surgical excision. The patient&rsquo;s six-month follow-up was uneventful. This case suggests that ganglion cysts should be included in the differential diagnosis of the hand and wrist pathologies because the late diagnosis can endanger the adjacent structures, such as the recurrent branch of the median nerve.</span></span></span></span></div> Ganglion cyst, Thenar muscle, Differential diagnosis 119 122 http://jros.iums.ac.ir/browse.php?a_code=A-10-872-1&slc_lang=en&sid=1 Hooman Shariatzadeh shariatzadeh_h@hotmail.com 10031947532846006527 10031947532846006527 No Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Alireza Mirzaei mirzaeialireza26@gmail.com 10031947532846006528 10031947532846006528 No Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran. Danial Hosseinzade danyal_h1984@yahoo.com 10031947532846006529 10031947532846006529 Yes Department of Orthopedics, Bone and Joint Reconstruction Research Center, School of Medicine, Iran University of Medical Sciences, Tehran, Iran.