A ductogram is a procedure performed to visualize the ductal anatomy of a breast lobe, often to evaluate patients with nipple discharge. A very thin, blunt cannula is inserted into the opening of a particular lactiferous duct, and contrast dye is injected followed by mammographic imaging. This example shows the ductal anatomy of a breast lobe, with reflux of dye into the lobular tubuloalveolar system.

Identify the following:

1. lactiferous duct

2. terminal ducts

3. tubuloalveolar gland lobule