![](https://www.endotext.org/wp-content/uploads/2017/02/ETX-Neuroendo3-Figure-5.png)
Figure 3a-5: Non-endocrine cells of the anterior lobe include small folliculo-stellate (FS) cells with delicately branching processes that invest endocrine cells (left, annexin-1 staining) and (on the right) very rare cells that are postulated to represent adult pituitary stem cells (PSC, nestin staining).