骨巨细胞瘤（ｇｉａｎｔｃｅｌｌｔｕｍｏｒ，ＧＣＴ）发病年龄多在２０～４０岁之间，且好发部位多在股骨远端及胫骨近端，但小于８岁且发生于跖骨者甚为少见。我院于１９９６年３月，收治１例５岁患儿，因发病年龄太小而致术前误诊。患儿　女。因右足疼痛、不适伴局部隆起２ The age of onset of giant cell tumor (GCT) is mostly between 20 and 40 years old, and the predilection sites are mostly in the distal femur and the proximal humerus, but those less than 8 years old and occur in the sacrum are very rare. In our hospital in March 1996, a 5-year-old patient was admitted to the hospital. The age of onset was too small and misdiagnosed before surgery. Children with children. Due to right foot pain, discomfort associated with local uplift 2