title: Coexistence of a pseudolesion and a true lesion in the same location: a rare misleading imaging finding.
abstract: Congenital cholesteatoma and asymmetric fatty marrow are both common masses that appear as imaging "lesions" in the petrous apex, but their treatment modalities are very different. Accurate preoperative recognition by computed tomography and magnetic resonance imaging is, therefore, important for planning appropriate management strategies. We report a case with coexisting congenital cholesteatoma and asymmetric fatty marrow in the same petrous bone. The 2 lesions were indistinguishable on high-resolution computed tomographic images and were only identified on fat-suppressed magnetic resonance imaging sequences. This is the first report of these 2 lesions coexisting, leading to a rare misleading imaging finding.
authors.affiliation: Department of Otorhinolaryngology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China. wuhaiyanmd@yahoo.com
authors.forename: Haiyan
authors.initials: H
authors.lastname: Wu
authors.forename: Xiuyong
authors.initials: X
authors.lastname: Ding
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Gao
authors.forename: Hong
authors.initials: H
authors.lastname: Jiang
mesh_terms: D000273:Adipose Tissue / Q000002:abnormalities*; D000293:Adolescent; D001847:Bone Diseases / Q000150:complications / Q000151:congenital* / Q000175:diagnosis; D001853:Bone Marrow / Q000002:abnormalities*; D018424:Cholesteatoma, Middle Ear / Q000150:complications / Q000151:congenital* / Q000175:diagnosis; D003937:Diagnosis, Differential; D006314:Hearing Loss, Conductive / Q000175:diagnosis / Q000209:etiology* / Q000601:surgery; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D013506:Otologic Surgical Procedures; D010579:Petrous Bone / Q000002:abnormalities* / Q000601:surgery; D014057:Tomography, X-Ray Computed