Adenocarcinoma is a cancer of an epithelium that originates in glandular tissue and in this book, the authors present topical research in the study of the pathogenesis, treatment and prognosis of adenocarcinoma. Topics discussed include prostate adenocarcinoma; female genital adenocarcinoma; endoscopic submucosal dissection for early non-invasive gastrointestinal cancers; metastatic adenocarcinoma in the head and neck region; castration resistant prostate cancer; feline endometrial and canine cutaneous adencarcinoma and advanced, unresectable adenocarcinoma of the gallbladder and biliary tract.