Giant-cell Tumor of Tendon Sheath of Hand; Evaluation of 35 Patient We have retrospectively evaluated tendon sheath giant cell tumors regarding their complications at the time of diagnosis, during treatment period and at postoperative period. We have performed surgery to 35 patients for their tendon sheath giant cell tumors localized in their hands [20 females, 15 males, mean age was 46.6 (17-72)]. Localization of the tumor was on the right hand side in 21 of the cases and on the left in 14 of the cases. Mean follow up time was 3.1 years (8 months-9.4 years). Most common complaints of the patients was a painless soft tissue mass. They were mostly on the volar side (%72) and on index finger (%25) and they were frequently found to be localized at the proximal phalanx (%51). The duration of the symptoms was between 3 months and 2.5 years. Bony involvement was found in 2 cases. At the postoperative period we have found digital nerve injury in 5 of the cases, superficial skin infection in 3 of the cases. We have found recurrence in 12 of the cases (%34.2) in a mean time of 2.8 years and joint stiffness was found in 8 of the cases. Tendon sheath giant cell tumors have high recurrence rates so surgery should be performed meticulously in a wide surgical field and magnifying glasses should be worn. Eldeki tendon kiliflarinda gelisen tendon kilifi dev hucreli tumorleri tani, tedavi ve ameliyat sonrasi donemde olusan komplikasyonlar acisindan retrospektif olarak degerlendirildi. On bes yillik bir donem icinde, el yerlesimli tendon kilifi dev hucreli tumor nedeniyle 35 hastaya [20 kadin, 15 erkek, ortalama yas 46,6 yil (17-72)] Ondokuzmayis Universitesi Tip Fakultesi Ortopedi ve Travmatoloji AD tarafinca cerrahi uygulandi. Lezyonlarin hepsi el yerlesimliydi. Tutulum 21 olguda sag, 14 olguda sol tarafta idi. Ortalama izlem suresi 3.1 yil (8 ay- 9,4 yil) idi.Hastalarin en sik basvuru nedeni agrisiz yumusak doku kitlesi idi. Olgularin cogunda (%71,4) tumor volar bolgeden kaynaklanmisti. Tumor siklikla isaret parmaginda (%25,7), ve proksimal falanks duzeyinde (%51,4) gelismisti. Bulgularin suresi 3 ay ile 2,5 yil arasinda degismekteydi. 2 olguda kemik tutulumu gozlendi. Ameliyat sonrasi donemde 5 olguda digital sinir hasari, 3 olguda yuzeyel enfeksiyon, 8 olguda eklem sertligi gelisti. 12 hastada (%34,3) ortalama 2,8 yil icinde (2 ay -5 yil) nuks oldu.Tendon kilifinin dev hucreli tumorlerinde yuksek nuks orani goz onune alinarak, genis cerrahi sahada titiz bir cerrahi uygulanmali ve buyutucu gozluklerden yararlanilmalidir.