title: Mucosubstance histochemistry and pathogenesis of acquired cholesteatoma.
abstract: Mucosubstance histochemical study of 33 cholesteatoma tissues was performed to clarify the distribution and character of mucin in the perimatrix. Mean density of glandular cysts was 0.18 per mm(2). Mean frequency of ruptured cysts was 0.16 per cyst. Glandular cysts as well as hollow spaces in the perimatrix were filled with sulfomucin and sialomucin. Fragments of mucin were found in some macrophages and multinucleated giant cells. Since phagocytosis is host defenses attempt, the process indicates that mucin in the perimatrix is a cause of inflammation. Sialomucin infiltrated in the subepidermis where the epidermis formed papillary proliferation without an apparent sign of inflammation. Six glandular cysts were found in the matrix and the debris. They may have been eliminated from the perimatrix as a sequel to cholesteatoma growth. These findings suggest that embedded mucosa in the perimatrix may play a crucial role in pathogenesis of acquired cholesteatoma.
authors.affiliation: Department of Otolaryngology, National Hospital Organization, Miyakonojo Hospital, Iwayoshi 5033-1, Miyakonojo City, Miyazaki, 885-0014, Japan. nagait@miyakonojo.hosp.go.jp
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Nagai
authors.forename: Tatsuo
authors.initials: T
authors.lastname: Suganuma
authors.forename: Soyuki
authors.initials: S
authors.lastname: Ide
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000423:Alcian Blue; D002648:Child; D002675:Child, Preschool; D018424:Cholesteatoma, Middle Ear / Q000378:metabolism / Q000473:pathology*; D004396:Coloring Agents; D003593:Cytoplasm / Q000378:metabolism; D004801:Eosine Yellowish-(YS); D004817:Epidermis / Q000378:metabolism / Q000473:pathology; D006416:Hematoxylin; D006801:Humans; D007211:Indoles; D008875:Middle Aged; D009077:Mucins / Q000378:metabolism; D015203:Reproducibility of Results; D013194:Staining and Labeling / Q000379:methods*
chemical_list: D004396:Coloring Agents; D007211:Indoles; D009077:Mucins; C055829:high iron diamine-alcian blue; D000423:Alcian Blue; D004801:Eosine Yellowish-(YS); D006416:Hematoxylin