title: Cystosarcoma phylloides. A steroid receptor and ultrastructure analysis.
abstract: Six cases of cystosarcoma phylloides were evaluated by ultrastructure and steroid receptor analysis. Electron microscopy of the lesions supported previous reports of a heterogeneous tumor consisting of pleomorphic mesenchyme and normal or proliferative epithelium. In each case estrogen and progesterone receptor analysis indicated the presence of a nonsaturable estrogen and progesterone 4S binding protein rather than a specific steroid receptor as suggested by previous studies.
mesh_terms: D000293:Adolescent; D001943:Breast Neoplasms / Q000032:analysis / Q000648:ultrastructure*; D003584:Cytological Techniques; D005260:Female; D006801:Humans; D008875:Middle Aged; D003557:Phyllodes Tumor / Q000032:analysis / Q000648:ultrastructure*; D011960:Receptors, Estrogen / Q000032:analysis*; D011980:Receptors, Progesterone / Q000032:analysis*
chemical_list: D011960:Receptors, Estrogen; D011980:Receptors, Progesterone