Fig. 9.

Separation of FC and media and the identification of FC, media and IPH using histology (H&E stain): (A) partially separated FC; (B) separated media with a small bit of connective fibrous tissue attached (marked by the arrow); (C) two adjacent rings with red/reddish IPH under FC (the one on the bottom is the same one shown in Fig. 3C); (D) the histology examination confirmed that the separated piece shown in (A) was fibrous tissue; (E) the histological result of the region enclosed by the dash-box in (B) showing well-organized media with less organized fibrous tissue attached (arrow); (F) the histology confirmed that the red part enclosed by the dash-in (C) was IPH under a very thin FC.