The Optimal Timing of Platelet-Rich Plasma (PRP) Injection for Nerve Lesion Recovery: A Preliminary Study

Figure 2

Histopathological evaluation using Hematoxylin Eosin (HE) stain. (A) Five fragments of nerve bundle from 1 sample specimen (100x) from which each bundle would be counted for inflammatory cells and endoneurium vacuole as cell percentage areas (200x). (B) Slides from group 1 with dominant vacuole >30% but less dominant inflammatory cells in 200x magnification. (C) Slides from group 4 with minimum inflammation cells and vacuoles (<5%) in 200x magnification. (D) Slides form group 2 with vacuoles covering almost all of the nerve (>50%) and dominant inflammatory cells (>20%) in 200x magnification. Blue arrow means nerve bundles; blue stars mean vacuoles; yellow arrows mean Schwann cells; and white arrow means inflammatory cells.