Granular myringitis is characterized by the development of granulation tissue over the
tympanic membrane and adjacent canal. The condition can be misdiagnosed as chronic otitis
media complicated with granulations, Since intermittent purulent discharge is the commonest
symptom in both disorders. Differentiation is based mainly on clinical findings which may be
difficult sometimes. In the present work, microscopical examination, by both light and electron
microscopes, of the granulation found in both criteria of each condition. Although the
components of the granulation tissue are similar:there are some subtle differences which are
discussed in details.
During our electronmicroscopic examination of the specimens from granular myringitis
intracellular inclusion bodies were detected frequently. This suggests that viruses may be
etiological factor.
Key words : granular myringitis, pathology, electronmicroscopy, virus. |
