Emotional stress may trigger growth of tumors.

The UK's Telegraph (1/14, Alleyne) reports that "everyday emotional stress is a trigger for the growth of tumors," according to research appearing in the journal Nature. Researchers found that "any sort of trauma, emotional or physical, can act as a 'pathway' between cancerous mutations, bringing them together in a potentially deadly mix." The findings challenge previous theories that "more than one cancer-causing mutation needed to take place in a single cell in order for tumors to grow."

        HealthDay (1/13, Dotinga) reported that researchers found that "cancer-causing mutations can work together, even when they're in diffe

Lung cancer breath test may distinguish between small cell, non-small cell histology.


MedPage Today (1/13, Phend) reported that a "'breath test' for lung cancer, appears to distinguish between small cell and non-small cell histology." Before reaching that conclusion, University of Colorado researchers cultured samples "in petri dishes and measured compounds in the 'headspace' air after several days of growth." The team eventually noted that "small cell lung cancer produced eight to 10 more" volatile "compounds than non-small cell lung cancer." Nevertheless, lead investigator Nir Peled, MD, PhD, said, "It will not replace the pathologist, though."

rent cells." In fact, "it is much easier for a tissue to accumulate mutations in different cells than in the same cell."


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