Fig. 2

Formalin-fixed paraffin-embedded serial section of PE (a, c) and DIE (b, d) stained against NGF (a, b) and TrkA (c, d). Original magnification × 100. The percentage NGF positive immune staining cells in stromal cells showed significant difference (*P < 0.00, **P < 0.00) in glandular epithelial cells and stromal cells between PE and DIE (e). No differences were seen for TrkA-positive immunostaining (f). High degree of positive staining was observed in the lumen of the endometriotic gland reflecting immune cells (b, d). Scale bar, 100 μm