• tumor cells
  • A small amount of extramedullary hematopoiesis was observed in the sinusoidal spaces between tumor cells. (e-cmh.org)
  • Tumor cells were diffusely immunoreactive for human melanoma black 45 (HMB45) and Melan A, focally immunoreactive for smooth muscle actin, but not for hepatocyte specific antigen (HSA). (e-cmh.org)
  • Immunohistochemically, these spindle tumor cells showed diffuse Vim and Bcl-2 positive reactivity, but S-100 protein and HMB45 were negative. (biomedcentral.com)
  • Immunohistochemically, these spindle tumor cells showed diffuse CD34 and Bcl-2 positive reactivity (Figures 8 and 9 ), S-100 protein and HMB45 were negative, Masson colouration disclosed lots of collagenous fiber. (biomedcentral.com)