A case of cartilaginous choristoma in epitympanum, presenting as attic cholesteatoma
Hyojung Kim1, Soomin Park2, Dong-Hee Lee1
1Department of Otolaryngology-Head and Neck Surgery, The Catholic University of Korea, Uijeongbu St. Mary’s Hospital, Seoul, Korea
2Department of Otolaryngology-Head and Neck Surgery, The Catholic University of Korea, Eunpyeong St. Mary’s Hospital, Seoul, Korea
2Department of Otolaryngology-Head and Neck Surgery, The Catholic University of Korea, Eunpyeong St. Mary’s Hospital, Seoul, Korea
Correspondence to: Dong-Hee Lee
주소 : Department of Otolaryngology-Head and Neck Surgery, The Catholic University of Korea, Uijeongbu St. Mary’s Hospital, 271 Cheonbo-ro, Uijeongbu 11765, Korea
Tel : +82-31-820-3564
E-mail : leedh0814@catholic.ac.kr
주소 : Department of Otolaryngology-Head and Neck Surgery, The Catholic University of Korea, Uijeongbu St. Mary’s Hospital, 271 Cheonbo-ro, Uijeongbu 11765, Korea
Tel : +82-31-820-3564
E-mail : leedh0814@catholic.ac.kr
Received May 13, 2022; Revised August 18, 2022; Accepted August 21, 2022.
- Abstract
- Choristoma, a type of heterotopia, is a rest of histologically normal tissue in an embryologically abnormal site. Although cartilaginous choristoma of bony external auditory canal has been found often, it is rare in the middle ear cavity. Because of the similarity of shape and color with cholesteatoma and the infrequency of middle ear choristoma, the diagnosis is unsuspected until surgical pathology is obtained. We report a case of attic cartilaginous choristoma in 21-year-old man. Initial diagnosis was attic cholesteatoma and surgical removal was done via transcanal approach. Histologically, it consists of mature cartilage without neoplastic features. This case highlights the importance of considering choriostoma when white mass is seen behind intact tympanic membrane and its feature looks like cholesteatoma.
- Keywords : Cartilage, Choristoma, Epitympanum, Middle ear
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