Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

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that are used in radiology and related fields with free access.

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    Otosclerosis - Veillon classification of otosclerosis

    Otosclerosis is a primitive dystrophia of the temporal bone that leads to abnormal bone growth. Veillon classification divides sites and extension of otosclerosis based on finding on HRCT of the temporal bone into 6 types.

    Type Description
    Ia isolated thickening of the footplate hypodensity
    Ib isolated anterior fenestral hypodensity <1mm (AFH)
    II isolated anterior fenestral hypodensity >1mm (AFH)
    III anterior fenestral hypodensity >1mm, hypodensity extends to the endosteum of cochlea
    IVa hypodense foci in the entire middle layer of the otic capsule: pericochlear hypodensity (PH), internal auditory canal hypodensity (IACH)
    IVb involvement of the entire otic capsule including the vestibule and semicircular canals

    References:

    1. Veillon F, Stierle JL, Dussaix J, et al.: Imagerie de l’otospongiose : confrontation clinique et imagerie. Journal de radiologie 2006;87(11-C2):pp 1756-1764
    2. Lagleyre S, Sorrentino T, Calmels MN, et al. Reliability of High-Resolution CT Scan in Diagnosis of Otosclerosis. Otology & Neurotology 2009;30:1152-1159.
    3. Slavikova K, Liskova Y, Malik M., et al. Zobrazovacie metody pri otoskleroze - skusenosti. Ces Radiol 2013;67(3):214-220.

    Updated 27/10/2013 23:15 by Lambert
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