A Case of Gluteal Lipoblastoma in a 7-Year-Old Boy

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  • 学童期に発生した臀部脂肪芽腫の1例
  • 症例報告 学童期に発生した臀部脂肪芽腫の1例
  • ショウレイ ホウコク ガクドウキ ニ ハッセイ シタ デンブ シボウ ガ シュ ノ 1レイ

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Abstract

<p>Lipoblastoma is a relatively rare benign tumor that develops favorably in the trunk and limbs of infants. It is a painless and rapidly growing tumor; therefore, it is difficult to distinguish from liposarcoma. Only 8 cases that occurred in the rump were reported, and all of them occurred under 2 years of age. We report a case of lipoblastoma that occurred in the rump of a schoolchild. A 7-year-old boy with a history of Kawasaki disease but without complications became aware of a gradually growing painless mass in the right rump. Physical examination revealed a walnut-sized tumor with elastic hardness and good mobility. The tumor has a well-defined oval shape and shows a high signal intensity and fat suppression on T1- and T2-weighted MR images. DWI and STIR indicated a high signal intensity and a mixture of components other than fat; thus, a teratoma was suspected before surgery. An incision was made along the intergluteal cleft in the prone position, and the tumor covered with a capsule was resected en bloc. The patient was discharged on the 7th day after operation without complication, and the pathological diagnosis was lipoblastoma.</p>

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