Dr. Tsai is developing next-generation diagnostics for low abundance cellular cancer samples. By measuring 40 or more markers simultaneously on individual tumor cells deposited on glass slides, he hopes to enable definitive diagnoses of blood and lymph node cancers without the need for invasive surgery or a histopathology laboratory. These methods will also provide a unique way to study these cancers, by merging traditional light microscopy with automated antibody-based multi-marker analysis.