RESUMO
ABSTRACT: Ewing sarcoma is the second most common osseous malignancy in pediatric patient. Metastasis is common due to its aggressive nature, with 25% of patients with metastasis at diagnosis, commonly to the lungs, bone, or bone marrow. Muscle metastasis is uncommon. We report FDG PET/CT findings of multifocal muscle metastases of recurrent Ewing sarcoma in the extremities without lung and bone involvement in a 6-year-old boy.
Assuntos
Fluordesoxiglucose F18 , Neoplasias Musculares , Tomografia por Emissão de Pósitrons combinada à Tomografia Computadorizada , Sarcoma de Ewing , Tomografia Computadorizada por Raios X , Humanos , Sarcoma de Ewing/diagnóstico por imagem , Sarcoma de Ewing/patologia , Masculino , Criança , Neoplasias Musculares/diagnóstico por imagem , Neoplasias Musculares/secundário , Extremidades/diagnóstico por imagem , Recidiva , Imagem Multimodal , Neoplasias Ósseas/diagnóstico por imagem , Neoplasias Ósseas/secundárioRESUMO
ABSTRACT: A 12-year-old girl presented with a history of kidney transplant complicated by posttransplant lymphoproliferative disease. A solid mass was found in the lower pole of the transplanted kidney, concerning for posttransplant lymphoproliferative disease. However, biopsy confirmed papillary renal cell carcinoma. FDG PET/CT showed increased activity in the known renal cell carcinoma in the renal allograft.