title: Two malignant soft tissue tumors of the kidney: an ultrastructural appraisal.
mesh_terms: D003094:Collagen; D003593:Cytoplasm; D005260:Female; D005347:Fibroblasts; D005354:Fibrosarcoma / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007668:Kidney / Q000473:pathology*; D007680:Kidney Neoplasms / Q000473:pathology* / Q000601:surgery; D007890:Leiomyosarcoma / Q000473:pathology* / Q000601:surgery; D008854:Microscopy, Electron; D008875:Middle Aged; D009210:Myofibrils; D009392:Nephrectomy; D009940:Organoids
chemical_list: D003094:Collagen