FIG. 4.

Histological analysis of TEVG at 14 days after implantation. Histologic examination showed cellular infiltration into the TEVG, and robust deposition of collagen throughout the TEVG in both experimental groups, although there was no evidence of elastin. von Kossa stain revealed no instances of calcification in either group. Poly(glycolic acid) fibers, which may appear as vacuoles or capillaries, still existed in the TEVG and caused nonspecific staining of both von Kossa and Alcian blue stains. Arrows indicate representative remaining fibers on HE staining. Boxed area highlights the region of TEVG section corresponding to high-magnification sections in each group. Color images available online at www.liebertpub.com/tec