rhabdomyosarcoma with mixed embryonal and alveolar features

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Disease Overview

A rhabdomyosarcoma composed of embryonic and alveolar components. It is characterized by the presence of spindle cells with myoblastic differentiation, a myxoid stroma, and fibrous septa. These tumors were previously considered variants of alveolar rhabdomyosarcoma. The lack of PAX3-FOXO1 fusions in most of these tumors suggests that are biologically and clinically related to embryonal rhabdomyosarcoma.


Synonyms

  • mixed alveolar rhabdomyosarcoma
  • mixed embryonal rhabdomyosarcoma and alveolar rhabdomyosarcoma
  • mixed type alveolar rhabdomyosarcoma
  • mixed type rhabdomyosarcoma
  • rhabdomyosarcoma with mixed embryonal and alveolar features