鎖骨部に生じたlow-grade fibromyxoid sarcomaの1例

A case of low-grade fibromyxoid sarcoma of the clavicular region

Ⅰ　はじめに

　低悪性線維粘液肉腫（low-grade fibromyxoid sarcoma：LGFMS）は1987年にEvans^1）によって提唱された稀な軟部腫瘍である。一見，良性の線維腫様の組織像を示すが，局所再発や遠隔転移の率が比較的高いとされる。

　今回われわれは左鎖骨部に発生したLGFMSの1例を経験したので，若干の文献的考察を加えて報告する。

　A low-grade fibromyxoid sarcoma（LGFMS）is a rare soft tissue tumor originally described by Evans in 1987. We reported a case of LGFMS of the clavicular region. A 22-year-old female presented with a painless mass in her left clavicular region which had gradually enlarged for the next five months. Initial diagnosis was a benign tumor by US,CT and fine needle aspiration（FNA）examinations. The tumor was surgically extirpated and it was histopathologically diagnosed as a low-grade fibromyxoid sarcoma. LGMFS shows a high rate of local recurrence and metastasis,so careful follow-up should be needed.