To perform ductoscopy, the physician inserts a rigid endoscope into the duct and directly visualizes the duct lining
On microscopic examination, wide areas of atrophy, ulceration, and squamous metaplasia of the epithelial duct lining
were seen, as was a surrounding patchy chronic inflammatory infiltrate with extensive fibrosis.
Dearborn, who is investigating the link between mold and infant pulmonary deaths for the Centers for Disease Control and Prevention, said the fungus that is suspected of causing those fatalities can grow in fiberglass duct lining
The first was fiberglass board 2'x 4' x 2", these boards were cut to be stacked and fill in between the MDF and the duct lining