Researchers urge monitoring of bone health during chemotherapy
 

In this article researchers found in mice a serious side effect of Neupogen (=Neulasta) not observed in humans. However they recommend monitoring of bone health to avoid possible bone cancer growth resulting from the bone loss associated with Neupogen.
http://mednews.wustl.edu/news/page/normal/8512.html
Researchers urge monitoring of bone health during chemotherapy