Hypopharynx, Larynx and Trachea
Rhabdomyoma (RM) is a benign neoplasm arising from striated muscle. It is composed of cytologically bland, delicate fetal myotubules in a myxoid stroma. There may be an admixture of rhabdomyoblasts.
Extracardiac RM is subclassified into adult rhabdomyoma
and fetal rhabdomyoma
, according to the degree of differentiation, and predominantly affects the head and neck region. Rare cases of extracardiac RM arise in the genital tract (genital rhabdomyoma
Fletcher CDM, Unni KK, Mertens F (Eds.)
World Health Organization Classification of Tumours. Pathology and Genetics of Tumours of Soft Tissue and Bone.
IARC Press: Lyon 2002