Mark the wrong statement about Orbital Rhabdomyosarcoma

RHABDOMYOSARCOMA: Most Common orbital tumor in children with mean age of 5-7 years Pluripotent mesenchymal cell origin Most common site of origin: Eyelid Incidence Male > female Unilateral more common Well circumscribed homogenous tumor Superonasal quadrant is the most common location Rapidly developing proptosis is the usual presentation Hpe of RHABDOMYOSARCOMA-consist of sheets of both primitive round and spindled cells in a myxoid stroma.