This book is unique because it transmits what the authors had learned in more than 40 years dedicated to teaching and studying testicular pathology. The work provides an integrating perspective on aspects of non-tumour pathology of the testicle, on testicular vascular pathology. Apart from the role of varicocele or testicular loss due to torsion of the spermatic cord, references to vascular pathology in Uropathology treatises are very scarce. This book brings together knowledge on arterial, venous, and lymphatic pathology, which have a negative impact on testicular function. Thanks to the high volume of material accumulated over the years in the Pathology Department of the Hospital Universitario La Paz, the authors ensure that the manuscript has an orderly structure that facilitates consultation or its use for teaching purposes. The content is structured in three sections. The first 10 chapters are dedicated to arterial pathology, the following 5 to venous pathology and 4 to pathology of the lymphatic vessels. This structured presentation of vascular pathology of the testis is useful for diagnosis and teaching in the fields of pathology, urology andrology.