{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,20]],"date-time":"2026-08-20T14:44:34Z","timestamp":1787237074795,"version":"build-2736575974"},"reference-count":43,"publisher":"Cambridge University Press (CUP)","issue":"8","license":[{"start":{"date-parts":[[2019,7,3]],"date-time":"2019-07-03T00:00:00Z","timestamp":1562112000000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Laryngol. Otol."],"published-print":{"date-parts":[[2019,8]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:sec id=\"S0022215119001385_sec_a1\">\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>Retraction pocket theory is the most acceptable theory for cholesteatoma formation. Canal wall down mastoidectomy is widely performed for cholesteatoma removal. Post-operatively, each patient with canal wall down mastoidectomy has an exteriorised mastoid cavity, exteriorised attic, neo-tympanic membrane and shallow neo-middle ear.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0022215119001385_sec_a2\">\n                    <jats:title>Objective<\/jats:title>\n                    <jats:p>This study aimed to clinically assess the status of the neo-tympanic membrane and the exteriorised attic following canal wall down mastoidectomy.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0022215119001385_sec_a3\" sec-type=\"methods\">\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>All post canal wall down mastoidectomy patients were recruited and otoendoscopy was performed to assess the neo-tympanic membrane. A clinical classification of the overall status of middle-ear aeration following canal wall down mastoidectomy was formulated.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0022215119001385_sec_a4\" sec-type=\"results\">\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Twenty-five ears were included in the study. Ninety-two per cent of cases showed some degree of neo-tympanic membrane retraction, ranging from mild to very severe.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec id=\"S0022215119001385_sec_a5\" sec-type=\"conclusion\">\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>After more than six months following canal wall down mastoidectomy, the degree of retracted neo-tympanic membranes and exteriorised attics was significant. Eustachian tube dysfunction leading to negative middle-ear aeration was present even after the canal wall down procedure. However, there was no development of cholesteatoma, despite persistent retraction.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1017\/s0022215119001385","type":"journal-article","created":{"date-parts":[[2019,7,3]],"date-time":"2019-07-03T05:01:40Z","timestamp":1562130100000},"page":"662-667","source":"Crossref","is-referenced-by-count":5,"title":["Long-term status of middle-ear aeration post canal wall down mastoidectomy"],"prefix":"10.1017","volume":"133","author":[{"given":"T","family":"Ezulia","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"B 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