label: Adult Botryoid-Type Embryonal Rhabdomyosarcoma
label_lc: adult botryoid-type embryonal rhabdomyosarcoma
description: A morphologic variant of embryonal rhabdomyosarcoma occurring in adults.  The neoplasm arises from organs containing a mucosal epithelial surface.  It is characterized by the formation of a cambium layer in the affected tissue and polypoid nodules with an abundant myxoid stroma.