This book discusses the global researches in the field of tumor angiogenesis. Angiogenesis is an extension process of the cardiovascular system within human body. It is mostly instigated by the need for oxygen and nutrients by the fast growing tissue and uncontrollably dividing cells, as observed during wound healing and tumor progression. This book emphasizes on tumor angiogenesis and presents topics written by highly experienced scholars from different countries. The objective of this book is to provide readers with an insight into the molecular and cellular mechanisms of this biological process and to present new research directions for future therapeutic endeavors.