PMC5586844_01
Spindle- to ovoid-shaped cells interspersed with irregular vascular channels and ectatic or compressed, thin-walled vessels.
mpp-0023-0170-g01.jpg
PMC5586844_01_mpp-0023-0170-g01.jpg
F1
Abundant blood vessels and rare irregular branching vessels in a haemangiopericytoma (HPC)-like (staghorn) pattern were observed (fig. 1).
Strong positive immunolabelling (brown staining) of tumour cells is evident with both CD34 (a) and Bcl-2 (b). Bcl-2 protein is associated with prolonged cell survival due to inhibition of apoptosis. c Numerous tumour cell nuclei are immunostained for PR. Avidin-biotin-peroxidase-DAB. a x100. b x250. c x400.
mpp-0023-0170-g02.jpg
PMC5586844_01_mpp-0023-0170-g02.jpg
F2
There was strong and uniform immunohistochemical reactivity for vimentin, CD34 and B-cell lymphoma 2 (Bcl-2) protein on paraffin-embedded tissue sections (fig. 2a, b). Nuclear staining for progesterone receptor (PR) was also observed (fig. 2c).