Primo Vascular System Accompanying a Blood Vessel from Tumor Tissue and a Method to Distinguish It from the Blood or the Lymph System

Figure 1

Illustration of primo vessels observed along a blood vessel. A primo vessel was found with a blood vessel or a nerve bundle inside the myofascia of the skin. The surrounding tissue around a xenografted tumor in the skin of the dorsal lumbar area (the boxed region near the tumor) was illustrated with the top view and the cross-sectional view. The nerve, artery, and primo vessel in the myofascia on the muscle layer were shown by arrows. The myofascia became thicker and squishier compared to normal skin.