1839: Theodor Schwann[61] and Matthias Jakob Schleiden elucidated the basic principle that crops and animals are made of cells, concluding that cells are a standard unit of structure and improvement, and therefore founding the cell concept. Abstract: The review concentrates on circulating tumor cells (CTCs) which have grown to be https://maps.app.goo.gl/UmD5JM5ww6NgkMzV9