After a person has suffered a stroke, identifying the root cause of the stroke becomes an essential part of preventing it from happening again, especially if the stroke was caused by atrial fibrillation (AF). Unfortunately, asymptomatic AF can be difficult to detect by standard methods and some doctors believe it may be an under-recognized cause of cryptogenic stroke (of unknown origin). (Diagnostics & Imaging Week)

A naturally fluorescent molecule found in all living cells could be the key to differentiating cancer cells from normal ones at the early stages of tumor progression. According to Penn State University (University Park, Pennsylvania) researchers, excess amounts of this fluorescent molecule could serve as a biomarker for cancer. (Diagnostics & Imaging Week)