Pathology is the medical specialty of diagnosing disease from tissues and liquids; in oncology, this is done by analyzing a portion of the tumor tissue via biopsies, resections, or cells in fluids. These tissues/cells are then chemically (e.g., hematoxylin and eosin, or papanicolaou) or immunohistochemically stained and viewed by a pathologist under a microscope. Pathologists provide the gold standard for diagnosis and with the use of molecular tools, help clinicians provide treatment recommendations [1]. Limitations of pathology include the sub-sampling of the tumor and visual analysis by only human cognition.