Extensive Epidermoid Cyst and Breathing Difficulty

Figure 4

Microscopic findings: (a) the lining of the cyst is composed of an epithelium which is flattened and contains a granular layer of keratohyalin granules, Haematoxylin and Eosin, 100x, and (b) foci of rupture and keratin exposed to the adjacent capsule and reaction composed of macrophages and foreign body giant cells (for keratin exposed), Haematoxylin and Eosin, 400x.

(a)

(b)