In the tympanoplasty of chronic otitis media, we have been our idea saving the mastoid cells as possible as we can, except a granulation or cholesteatoma exist. We left the mastoid cells by observation in the operation-microscope, nevertheless we saw the unfavourable progress occasionaly. And so, in order to demonstrate this cause, we compared a histopathological observation of mastoid with postoperative course.
Clinical states of 70 cases:
A) 35 cases were favourable,
B) 23 cases were Prolonged the recoverry by a granulation and exsudation in the surface of mastoid wound,
C) 6 cases were prolonged the recovery and reperforation of drum membrane after leaving hospital,
D) 6 cases had the reperforation during a hospitalization period by the excessive exsudation in the tympanic cavity and the surface of the mastoid wound, or a formation of excessive granulation.
Histo-pathological states:
a) 36 cases indicated the old granulation tissue or hyper-cornification: fibrocyt and fibroblast, or a excessive cornification was seen principally,
b) 5 cases indicated a new granulation tissue or acut inflammatory change: neutrophil leukocyt, lymohocyt, plasma cells, exsudation, bleeding and many blood capillar was seen principally,
c) 5 cases indicated allergic change: hydrops, eosinophil leukocyt mast cells and plasma cells was seen many,
d) 3 cases indicated many duct and a cystic formation with an infiltration of cells,
e) 5 cases indicated an appearance of the cholesterin crystall and giant cells,
f) 16 cases indicated the mixed type of a and b, a and c, or b and c, we compared a clinical states with a histopathological states. As a result of this, we knew that the most C and D which progress was unfavourable showed c, d and e type of histopathological condition and A type which progress was favourable did not showed d and c and then the most A was a type of histopathological condition.
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