Clinically accessible information for pathologists on the fast moving field of molecular pathology and oncology, addressing molecular and genetic approaches to the diagnosis and classification of tumors, predictive biomarkers for treatment response and disease progression. Recurrent in this series, summaries are provided of Key Features of tumor, Key molecular prognostic markers and therapeutic markers, Tumor suppressor genes, and Oncogenes. Topics include molecular pathology of: Breast, Gastrointestinal, Head and Neck, Genitourinary, Gynecologic, Hematopathology, Lung, Neuropathology, Pancreas/Biliary, and Sarcome.