[Stereotactic 11-gauge directional vacuum-assisted breast biopsy: experience with 249 patients].

Purpose: To assess the value of percutaneous vacuum-assisted core biopsy to improve the diagnosis of non palpable mammographic abnormalities.

Materials And Methods: A total of 252 core biopsies using an 11G Mammotome((R))were performed in 249 patients. Stereotactic localization was performed in the prone position on a dedicated digital Fischer table.

[Round cell liposarcoma. Histopathologic and ultrastructural study of a case developed within the framework of a lipomatosis].

The authors report one case of round cells liposarcoma developing in a patient with multiple lipomas. Some clinical and ultrastructural aspects allow to focus the discussion on the histogenesis and the exact position of this tumor in the histologic classification of liposarcomas.