Infantile Fibrosarcoma

  • Etiology: spindle cell tumor
  • Imaging: heterogeneous soft tissue mass with hemorrhagic / necrotic / fibrous / cystic components, may have higher flow vessels mimicking infantile hemangioma
  • Complications: low rate of metastases (8%) + high long term survival unlike fibrosarcoma in adults, local recurrence so need to do wide excision
  • Clinical: most common soft tissue sarcoma in < 1 year old

Cases of Infantile Fibrosarcoma

US and CT of infantile fibrosarcoma
Sagittal US of the mass (above) revealed increased vascularity peripherally and central ulceration. Axial and sagittal CT with contrast of the chest (below) shows a mass arising near the right scapula of heterogenous density with variable enhancement.