| They subsequently determined that cells within the ribbon were dividing, implying that they were part of a region of proliferative stem cells. |
| Histologically, these lesions form a spectrum of tumors ranging from benign cystic adenomas to proliferative cystic sebaceous tumors. |
| At this time, expression within the eyes and tectum becomes restricted to cells within the proliferative germinal zones. |
| Differentiated cells however, generally have limited proliferative power and only short-term cultures are possible. |
| Intraductal proliferative lesions are associated with increased invasive cancer risk. |
| In woody plants, the cambial layer in the trunk, branches and roots also retains proliferative capacity. |
