骨瘤是一種很普遍的骨腫瘤，它通常發生於前額竇。這種病灶很小，但有些病灶可以引起副鼻竇炎。骨骼外骨瘤是一種相當罕見的骨瘤，在文獻上很少提及。在手部發生更是罕見。我們提出一例在手上發現之罕見報告，一位67歲的病人，手上有一腫瘤，其間有超過10年，最近有增大的現象，病人到本院求診。病人接受常規素片和磁振造影檢查。這些檢查提供出很有意義的資料。在手術前便考慮到包括骨骼外骨瘤之診斷。手術後經病理科證實是骨骼外骨瘤。骨骼外骨瘤是一種非常罕見的骨瘤，但是其在常規素片和磁振造影檢查的特徵。手術前之診斷是有可能的。
Osteoma is a common benign bone tumor, usually occurring inside the frontal sinuses and the mandible. The size of the lesion is usually small. It may induce sinusitis if it occurs inside the paranasal sinus. Extraskeletal osteoma is rare in soft tissue. A 67-year-old man presented with a lesion on the palm of his right hand; the lesion had been present for more than 10 years. Radiograph and magnetic resonance imaging of his hand provided adequate information for a differential diagnosis of extra-skeletal osteoma to be made before operation. The tumor was completely resected. Pathology confirmed extra-skeletal osteoma. To the best of our knowledge, this is the first case of extraskeletal osteoma of hand.
