A Case of a Child with a Lipoma of the Middle Ear and a Concomitant Chondroma of the External Auditory Canal

Abstract

Journal of Case Reports in Medicine,2012,1,1,1-4.Published:June 2012Type:Case ReportAuthors:Tomoyasu Tachibana, Kazunori Nishizaki, Masayoshi Fujisawa, Yuya Ogawara, Yuko Matsuyama, Iku Abe, and Michihiro Nakada Author(s) affiliations:Tomoyasu Tachibana,1 Kazunori Nishizaki,2 Masayoshi Fujisawa,3 Yuya Ogawara,1 Yuko Matsuyama,1 Iku Abe,1 and Michihiro Nakada4 1Department of Otolaryngology, Himeji Red Cross Hospital, 12-1 Shimoteno 1-Chome, Himeji City, Hyogo 670-8540, JAPAN. 2Department of Otolaryngology, Okayama University Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, 2-5-1, shikata-cho, kita-ku, Okayama City, Okayama 700-8558, JAPAN. 3Department of Pathology, Himeji Red Cross Hospital, 12-1 Shimoteno 1-Chome, Himeji City, Hyogo 670-8540, JAPAN. 4Nakada ENT Clinic, 2-2-20, Shirakuni, Himeji City, Hyogo 670-0808, JAPAN. Abstract:The case of a 2-year-old boy with a right middle ear lipoma and a concomitant chondroma of the left external auditory canal is presented. The patient’s preoperative diagnosis was cholesteatomas of the right middle ear and left external ear canal. A right-sided epitympanotomy was performed. A lump of fatty tissue in the right anterior middle ear cleft that obstructed the Eustachian tube orifice was found. The white mass in the left external auditory canal, which easily separated from the tympanosquamous fissure of the temporal bone, was excised with a Rosen needle. Histopathologic examination revealed a lipoma of the right middle ear and a chondroma of the external ear canal. No cases of concomitant lipoma and chondroma have been previously reported. In the present case, the middle ear lipoma could be classified as a congenital anomaly because of its association with a contralateral side chondroma, which would be a choristoma. Keywords:Chondroma; Choristoma; LipomaView:PDF (1.3 MB) PDF Images Figure 1: Macroscopic findings of the right (left panel) and left (right panel) ear during the operation. Otoscopy reveals an opacity in the anterosuperior quadrant of the right membrane and a flat, smooth, white mass in front of the short process of the malleus on the superior wall of the left bony external auditory canal.