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25 Possible Causes for Hypoplastic Mastoids

  • Coffin-Lowry Syndrome

    Gene. 2016 Jan 1;575(1):42-7. doi: 10.1016/j.gene.2015.08.032. Epub 2015 Aug 20. Author information 1 Section of Reproductive Endocrinology, Infertility & Genetics, Department of Obstetrics & Gynecology, Georgia Regents University, Augusta, GA 30912, USA; Department of Neuroscience and Regenerative Medicine, Georgia[…][]

  • 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.[]

  • 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[]

  • Autosomal Dominant Prognathism

    Chest X-ray shows cone shaped thorax with narrow upper thoracic diameter, absent or hypoplastic clavicles and scapulae.[ 9 ] Pseudoarthrosis can be considered as differential[] […] abnormalities include wide-open sutures, patent fontanels, presence of wormian bones and delayed ossification of skull, decreased pneumatization of paranasal, frontal and mastoid[]

  • CHARGE Syndrome

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

  • Spinal Pachymeningitis

    CT of the temporal bone showed fluid and soft tissue thickening in the middle ear and denser mastoid cells on the left side.[] CT of the sinuses showed a hypoplastic left maxillary sinus with thickening of the mucous membrane and an air-fluid level, but no granuloma.[]

  • Abscess of the External Auditory Meatus

    The facial nerve canal shows a relatively long labyrinthine segment ( a, arrowhead ); note the associated hypoplastic appearance of the ossicular chain ( a, arrow ).[] Short tympanic segment of facial nerve ( b, arrowheads ); a second genu cannot be clearly identified, but the mastoid segment of the facial canal is running posterolaterally[]

  • Mandibulofacial Dysostosis

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

  • 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[] Conclusion The characteristic temporal bone CT findings for Cornelia de Lange syndrome include a stenotic external auditory canal, hypoplastic mastoid, soft-tissue opacification[] […] of the tympanomastoid cavity, dysmorphic ossicle, hypoplastic cochlea, and dysplastic vestibule, which agree with previously described histopathologic findings.[]

  • Cleidocranial Dysplasia

    […] paranasal sinuses, including mastoids Delayed or defective dentition Abnormally retained primary teeth In adulthood, petrous bones may be sclerotic Chest Hypoplasia or absence[] Additionally, there may be poor or absent pneumatisation of paranasal, frontal and mastoid, sphenoid sinuses [9].[] Persistent metopic suture Midline suture in frontal bone Brachycephaly and prominent bossing Large mandible Nonunion of mandibular symphysis High narrow palate; may be cleft Hypoplastic[]

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