PMC4579305_01
Preoperatory (a) and postmyringoplasty (b) otomicroscopic images.
CRIOT2015-187187.001.jpg
PMC4579305_01_CRIOT2015-187187.001.jpg
fig1
Physical examination revealed a whitish, round-shaped malformation located in the posterior-inferior quadrant of the right tympanic membrane (Figure 1).
A 0.5 cm yellowish nodule (a). Histological macroview (HE 1.5x) (b). Multiloculated cystic formation lined by a monostratified nonmucin productor cuboidal epithelium (400x HE and 630x HE) (c) and (d). Immunohistochemical analysis shows cytokeratin-positive cells (AE1 and AE3) (e) and negativity for S100 protein, neural specific enolase, glial fibrillary acidic protein (GFAP), and synaptophysin (400x) (f).
CRIOT2015-187187.002.jpg
PMC4579305_01_CRIOT2015-187187.002.jpg
fig2
No cholesteatomatous component was observed and well defined margins were distinguished (Figure 2).