Figure 5

Immunohistochemical results. A. CD34 positivity within infiltrating tumor nodules separated by desmoplastic stroma and negativity in lymphatic vessels (arrows). 3'-3'-diaminobenzidine tetrahydrochloride. (DAB) × 40. B. Nodules of infiltrating spindle cells showing immunoreactivity to CD34. A vessel showing CD34 positivity is noted (arrow). DAB × 200. C. Higher magnification showing diffuse positivity with CD34. DAB × 400.D. CD31 positivity discretely within spindle-shaped tumor cells. DAB × 400.E. Focal SMA positivity within pericytic cells. DAB × 200.