[Malignant mesenchymoma. A case report (author's transl)]

Signs of vascular and nerve compression were marked in a case of retroperitoneal malignant mesenchymoma presenting characteristic clinical signs and symptoms of slow progression. The fundamental value of intravenous urography and a barium meal to define the extent of the tumor and its relationships with the principal abdominal viscera is emphasized. When aniographic images are absent, as in this case, the pedicles have to be carefully isolated and temporarily clamped to avoid vascular accidents. As wide as possible an excision has to be performed to delay the appearance of the almost inevitable recurrences.