Giant cell tumor of tendon sheath in supraclavicular region: Common tumor in an uncommon location: Case report

Abstract

Giant cell tumor of tendon sheath is a common neoplasm, frequently developed around small digital joints of hand, and less commonly in wrist, ankle, foot and knee. GCT Tendon Sheath of other locations are very rare. The cytological feature of is unique, but it could mimic neoplasm, inflammation or other lesions when arising in unusual locations. We reported a case of a 26-year-old male who presented with a supraclavicular mass. Microscopic features of excised mass revealed well-demarcated oval nodule, composed of polymorphous population of multinucleated giant cells and mononuclear cells with fi septa, consistent with the diagnosis of GCT Tendon Sheath. Local recurrence is not occurring during five-year follow-up. The purposes of this report is to present the rarity of this tumor in an exceedingly rare location and to help avoid misdiagnosis with other mimics.