In this issue of Veterinary Clinics: Small Animal Practice, guest editor Dr. Helena Rylander brings her considerable expertise to the topic of Update on Diagnosis and Treatment of Brain Tumors in Dogs and Cats. Top experts discuss current and innovative techniques in diagnosing and treating brain tumors, helping readers provide correct information and treatment options to pet owners. Topics include MRI of the brain; the use of intraoperative ultrasound in brain surgery; biopsy of brain lesions; radiation therapy for brain tumors in dogs and cats; and many more.