Figure 4. Transmission electron microscopy micrograph of pterygium. Elongated telocyte-like cells scattered in the stroma and around blood vessels were observed (A, B). Several long and thin Tps circling small blood vessels (A, B) and adjacent to the basement membrane (C) of the epithelium were detected. In A, a Tp that formed heterocellular contact points (arrows) with a morphologically resembling stem cell was observed. C: A basal epithelial stem cell adjacent to Tps running parallel to the line of the stromal–epithelial junction. Scale bar: A–C = 1 µm.