[Mesenchymoma of the chest wall in childhood (author's transl)].

A case report on the mesenchymal mixed tumor (mesenchymoma) of the chest wall of a baby is given. It was composed of chondroblastoma and osteoblastoma and of areas of angioblastoma. This neoplasm shows immature areas and infiltrates extensively the adjacent tissues. The morphologic classification of benign and malignant mesenchymoma is uncertain and does sometimes not correspond to the behaviour. The significance of different histological features of these tumors in relation to the prognosis is discussed.