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74 Possible Causes for Hypoplastic Mastoids

  • Coffin-Lowry Syndrome

    Two unrelated patients with Coffin-Lowry syndrome are described. The main characteristics of a typical face, thick hands with tapering fingers and a transverse hypothenar crease, general hypotonia with extensible joints made diagnosis possible before the age of 6 months. A persistent large anterior fontanel[…][ncbi.nlm.nih.gov]

  • Cornelia De Lange Syndrome

    The most common and easily identifiable characteristics of Cornelia de Lange syndrome by visual inspection were the following: 1) hypoplastic mastoid (60%); 2) soft-tissue[ajnr.org] Conclusion The characteristic temporal bone CT findings for Cornelia de Lange syndrome include a stenotic external auditory canal, hypoplastic mastoid, soft-tissue opacification[ajnr.org] […] of the tympanomastoid cavity, dysmorphic ossicle, hypoplastic cochlea, and dysplastic vestibule, which agree with previously described histopathologic findings.[ajnr.org]

  • CHARGE Syndrome

    All patients had a hypoplastic mastoid, semicircular canal aplasia, and had some degree of cochlear dysplasia.[ncbi.nlm.nih.gov]

  • Congenital Mandibular Hypoplasia

    Hypoplastic mastoid process with partial or complete lack of pneumatization of the mastoid air cells mandible : hypoplastic mandibular condyle, reduced height of the mandibular[radiopaedia.org]

  • Mandibulofacial Dysostosis

    Agenesis or hypoplastic development of the mastoid and mastoid antrum. 3. Absence of the external auditory canal. 4.[ncbi.nlm.nih.gov]

  • Deafness with Labyrinthine Aplasia - Microtia - Microdontia

    In 8 ears, the mastoid bone height was minimally reduced, and the mastoid tips were hypoplastic and high-positioned ( Fig 4 ). Fig 2.[ajnr.org] Mastoid process development occurs after the second year of age, and imaging performed before then may also give a false impression of a hypoplastic mastoid tip.[ajnr.org] The petrous bone was hypoplastic in all 14 ears, but the otic capsule was aplastic in only 5. The middle ear and mastoid volumes were decreased in most of the ears.[ajnr.org]

  • Streptomycin

    hypoplastic endolymphatic sac.[ncbi.nlm.nih.gov] In the left ear the Silastic strip that was intended to function as an endolymphatic shunt into the mastoid lies encased in fibrous tissue and failed by 4.5 mm to reach the[ncbi.nlm.nih.gov]

  • Microtia

    The middle ear deformity may range from diminished canal caliber and minor ossicular abnormalities to fused, hypoplastic ossicles and failure of mastoid bone aeration.[microtia.us.com]

  • Autosomal Recessive Deafness 24

    A poorly developed tympanic cavity and a hypoplastic mastoid antrum associated with CAA may render surgical access to the round window difficult.[slideheaven.com] ) and absent or hypoplastic in 1/6 (16.6%) (Fig. 3).[slideheaven.com] In the remaining 9/17 ears (53%), the mastoid was poorly pneumatized.[slideheaven.com]

  • Autosomal Recessive Deafness 46

    A poorly developed tympanic cavity and a hypoplastic mastoid antrum associated with CAA may render surgical access to the round window difficult.[slideheaven.com] ) and absent or hypoplastic in 1/6 (16.6%) (Fig. 3).[slideheaven.com] In the remaining 9/17 ears (53%), the mastoid was poorly pneumatized.[slideheaven.com]

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