Figure 2
From: Foetal haemoglobin-blood cells (F-cells) as a feature of embryonic tumours (blastomas)

Retinoblastoma. (A) Proliferating blood vessels full of Fc. Thirty percent are (nucleated) Feb, two of which are indicated by arrow. Calibration bar, 50 μm. (B) A condensation of extravascular Fc (indicated by arrow) between the two blood vessels of Fc. Calibration bar, 50 μm.