SAN DIEGO--(BUSINESS WIRE)--Biotheranostics, a leader in molecular diagnostics for cancer, today announced results from a study developing a functional workflow for gene expression profiling using blood samples, providing insights into the potential for circulating tumor cell-based cancer classification that may help reduce dependency on tissue specimens. The study will be presented at the American Association for Cancer Research (AACR) annual meeting, April 16-20, in New Orleans.