label: Infantile Fibrosarcoma
label_lc: infantile fibrosarcoma
description: "A fibrosarcoma that occurs in infants.  It shares identical morphologic features with adult fibrosarcoma but carries the t(12;15)(p13;q25) translocation that results in ETV6-NTRK3 gene fusion.  It usually affects the superficial and deep soft tissues of the extremities.  The prognosis is generally much more favorable than for adult fibrosarcoma, and it rarely metastasizes."