[Cystosarcoma phyllodes].

From a total number of 31 patients with the diagnosis of cystosarcoma phyllodes recorded by the authors, in two thirds the benign and proliferating form of the tumour was involved, in one third a malignant type of tumour. In benign tumours it is sufficient to extirpate the tumour completely, incl. capsule of the tumour. In malignant forms radical modified mastectomy with revision of the axilla must be performed. When the histological findings have a high grading (non-differentiated anaplastic), adjuvant radiotherapy or a combination of radiotherapy and chemotherapy must be used. Dispensarization of patients with the diagnosis of cystosarcoma phyllodes is essential.