Book excerpt: Discusses the practical pathologic diagnoses of tumours and tumour-like diseases of the prostate gland, seminal vesicles, penis, and scrotum. The authors follow the tradition of the preceding three editions by emphasising pathologic gross and light microscopic diagnostic features and differential diagnoses. They also discuss relevant clinical features, including concise sections on the clinical presentation and the clinical meaning of the pathologic diagnosis in terms of prognosis and treatment. The immunohistochemical and molecular pathologic studies that are of current value in diagnosis are clearly presented. The high-quality images follow the rich tradition of the previous editions to depict the spectrum of tumour morphology from cases mainly from the files of institutions such as The Johns Hopkins Hospital, Barnes-Jewish Hospital, and Instituto de Patología e Investigación. This Atlas will be of great value in the field of pathology of the prostate gland, seminal vesicles, penis, and scrotum for years to come.