Immunohistochemical analysis of retraction pocket pars tensa of tympanic membrane in children
| Authors | |
|---|---|
| Year of publication | 2019 |
| Type | Article in Periodical |
| Magazine / Source | International journal of pediatric otorhinolaryngology |
| MU Faculty or unit | |
| Citation | |
| Web | http://dx.doi.org/10.1016/j.ijporl.2019.04.008 |
| Doi | http://dx.doi.org/10.1016/j.ijporl.2019.04.008 |
| Keywords | Retraction pocket; Cholesteatoma; Immunohistochemistry; Chidren; Pars tensa |
| Description | Aims: Immunohistochemical analysis of retraction pocket pars tensa of tympanic membrane in children. Identification of signs typical for cholesteatoma and support of retraction theory of cholesteatoma. Study design: a prospective study analysing 31 surgically removed retraction pockets. Department: University Hospital, Children's Medical Centre Methods: Retraction pockets processed by a standard process for immunohistochemical analysis. The observed findings were specified using antibodies CD45 LCA (leukocyte common antigen), CD31 (platelet endothelial cell adhesion molecule), D2-40 (marker of lymphatic endothelium), MMP9 (marker of degradation of connective tissue extracellular matrix) and Ki67 (cellular marker of proliferation). Results: All observed parameters except for MMP9 had a significantly higher incidence in retraction pocket stage III compared to stage II according to Charachon. Conclusion: We described immunohistochemical signs of retraction pocket pars tensa of tympanic membrane in children resulting in cholesteatoma. All the observed signs occur in the structure of matrix and perimatrix of cholesteatoma. A significantly higher incidence of all observed parameters except from MMP9 was proved in retraction pocket stage III, unlike in stage II. This observation proves the fact that retraction pocket is a progressive disease and is a procholesteatoma stage. |
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