Primary pulmonary rhabdomyosarcoma in a child, with a review of literature.

A cyst in the left lower lobe of the lung was removed from a 15-month-old girl and showed evidence suggesting a preexistent congenital cystic adenomatoid malformation; in addition a rhabdomyosarcoma was identified. Primitive mesenchyme and mesenchymal elements also were seen. The origin of the rhabdomyosarcoma is discussed. The findings in the present case are compared with those of all childhood pulmonary rhabdomyosarcomas reported in the literature. This report of a child with a coexistent congenital adenomatoid malformation and a rhabdomyosarcoma is the third of its kind in the literature.