This book treats all the morphological aspects of diseases of vessels (arteries, veins and lymphatics). Practical aspects of diagnosis have been emphasized, because most of the pathological books are presented with artificial classifications. Some concern arteries, other veins or lymphatics. In fact, most vascular diseases are more general involving two or three vascular compartments. Pathological terminology is used correlated with clinical data accessible for every practitioner and clinician. This is a how-to-do document to reach a diagnosis from clinical informations, laboratory data to the diagnosis.