Prostate cancer cells that defy treatment.

• Position: HEALTH BEAT

Prostate cancer cells that defy treatment and display heightened tumor-generating capacity can be identified by levels of prostate specific antigen (PSA) expressed in the tumor cells, report scientists at The University of Texas MD Anderson Cancer Center, Houston. "We were able for the first time to separate low- and high-PSA cancer cells. This led to the discovery of low-PSA populations of cancer stem cells that appear to be an important source of...