The difference in congenital cholesteatoma CT findings based on the type of mass

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• 作者：A. Tada^a ; ^{tada-a@cc.okayama-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; R. Inai^a ; ^{mogmog@jb3.so-net.ne.jp" class="auth_mail" title="E-mail the corresponding author} ; T. Tanaka^a ; ^{takaikokorozashi@hotmail.com" class="auth_mail" title="E-mail the corresponding author} ; Y. Marukawa^a ; ^{marukawayouhei@yahoo.co.jp" class="auth_mail" title="E-mail the corresponding author} ; S. Sato^a ; ^{shuhei@cc.okayama-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; K. Nishizaki^b ; ^{nishizak@cc.okayama-u.ac.jp" class="auth_mail" title="E-mail the corresponding author} ; S. Kanazawa^a ; ^{susumu@cc.okayama-u.ac.jp" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Congenital cholesteatoma ; Computed tomography ; Middle ear ; Closed type ; Open type
• 刊名：Diagnostic and Interventional Imaging
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：97
• 期：1
• 页码：65-69
• 全文大小：646 K

文摘

A retrospective assessment of differences in congenital cholesteatoma CT findings with a focus on type of cholesteatoma mass.

Materials and methods

The medical records and CT images of 14 patients with congenital cholesteatomas in the middle ear who underwent surgery at our institution between January 2009 and July 2014 were reviewed. Cholesteatomas were classified as closed type, open type, or mixed type based on intraoperative findings. The CT findings including cholesteatoma size, location, and shape were retrospectively reviewed.

Results

Eight patients had closed type cholesteatomas, four had mixed type, and two had open type. The mean size of all cholesteatomas was 5.1 mm. None of the cholesteatoma types indicated a tendency towards a certain location. The round shape was observed more frequently in closed type cholesteatomas than in other types (closed: 5/8; mixed: 1/4; open: 0/2). Two large closed type cholseteatomas and two mixed type cholesteatomas exhibited a constricted shape. Both of the open type cholesteatomas displayed an irregular shape.

Conclusion

Small closed type congenital cholesteatomas were typically observed as round shaped lesions, but large closed type cholesteatomas and other type cholesteatomas tended to display shapes other than round.