The giant cell tumor of bone is one of the most controversial neoplasms due to growth patterns that may present. The case reported shows a very aggressive tumor in a classic location, but key to hand function. Rather than treat with radical surgery, was planned and performed a wide resection with an ulnar-carpus arthrodesis and microsurgical reconstruction of the defect throught an anterolateral thigh flap. The multidisciplinary approach of bone neoplasms produce a positive impact on patients.

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