- Etiology: spindle cell tumor
- Imaging: heterogeneous soft tissue mass with hemorrhagic / necrotic / fibrous / cystic components, may have higher flow vessels mimicking infantile hemangioma
- MRI: well demarcated, T1WI isointense to muscle, T2WI heterogenously hyperintense, heterogenous enhancement
- Complications: low rate of metastases (8%) + high long term survival unlike fibrosarcoma in adults, local recurrence so need to do wide excision
- Clinical: rapidly growing, most common soft tissue sarcoma in < 1 year old, mostly in neonates and usually in < 2 yo, > 70% in extremities, 60% in lower extremities
Radiology Cases of Infantile Fibrosarcoma

Clinical Cases of Infantile Fibrosarcoma
