Johns Hopkins researchers have found a likely explanation for the slow growth of the most common childhood brain tumor, pilocytic astrocytoma. Using tests on a new cell-based model of the tumor, they concluded that the initial process of tumor formation switches on a growth-braking tumor-suppressor gene, in a process similar to that seen in skin moles. The findings, published in the June 1 issue of Clinical Cancer Research, could lead to better ways of evaluating and treating pilocytic astrocytomas. Eric Raabe led the study, and a full press release can be found in the links below.
http://www.sciencedaily.com/releases/2011/06/110623174132.htm
http://www.hopkinsmedicine.org/news/media/releases/slow_growth_of_childhood_brain_tumors_explained