[Tumors of the soft parts of the radix of the thigh].

A case of complex structured mesenchymal neoplasia of the root of the thigh is reported. After a review of the literature and discussion of the anatomo-clinical aspects of the case in point, a common identity between tumours of the root of the thigh and mesenchymal tumours of the retroperitoneum is suggested, on the basis of anatomo-histogenetics.