| The mass was excised and was characterized histologically as another proliferative cystic sebaceous tumor. |
| Flies homozygous for such hypomorphic mutations reach adulthood, but often exhibit defects during the proliferative stages of gametogenesis. |
| This suggests that the c-erb-b2 oncoprotein may possibly be involved in proliferative responses of pancreatic epithelium. |
| In other types, such as the blue nevus, proliferative tissue is buried deep within the dermis, the lower layer of the skin. |
| Differentiated cells however, generally have limited proliferative power and only short-term cultures are possible. |
| At this time, expression within the eyes and tectum becomes restricted to cells within the proliferative germinal zones. |
