18F FDG-PETが有用であった小児の壊疽性膿皮症の1例

A case of pediatric pyoderma gangrenosum with fever of unknown origin

壊疽性膿皮症とは，細菌感染が直接関与しない原因不明の膿疱と特徴的な潰瘍が出現し穿掘性に拡大する皮膚の慢性炎症性疾患である^1）。今回我々は小児の壊疽性膿皮症の診断に¹⁸F FDG-PETが有用であった1例を経験したので報告する。

Five-years-old boy was referred to our hospital for examination and treatment of intractable ulcer on his knee with fever of unknown origin（FUO）. ¹⁸F FDG-PET images showed increased ¹⁸F FDG uptake in his knee, ascending aorta and aortic arch. Furthermore, contrast enhancement CT images revealed thickening and increasing of enhancement in his aortic wall. After these examinations were performed, he was diagnosed pyoderma gangrenosum with Takayasu’s arteritis. ¹⁸F FDG-PET was useful for diagnosis of Takayasu’s arteritis with FUO.