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Osteoradionecrosis of the temporal bone

R T Ramsden, C H Bulman, B P Lorigan

    The Journal of Laryngology and Otology
    |September 1, 1975
    PubMed
    Summary

    Osteoradionecrosis of the temporal bone presents two patterns: localized tympanic plate involvement and diffuse necrosis. Radiotherapy targeting the temporal bone increases diffuse disease risk, a complication that can manifest years later.

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    Area of Science:

    • Otolaryngology
    • Radiation Oncology
    • Oncology

    Background:

    • Osteoradionecrosis (ORN) of the temporal bone is a serious complication following radiotherapy.
    • Understanding the patterns and risk factors of ORN is crucial for patient management.

    Purpose of the Study:

    • To describe the patterns of osteoradionecrosis of the temporal bone.
    • To identify factors associated with different ORN patterns.
    • To highlight the long-term nature of this complication.

    Main Methods:

    • Retrospective case series analysis of twenty-nine patients with temporal bone osteoradionecrosis.
    • Review of clinical data and radiotherapy treatment parameters.

    Main Results:

    • Two distinct patterns of ORN were observed: localized tympanic plate involvement and diffuse temporal bone necrosis.
    • Localized ORN often resolved spontaneously, while diffuse ORN carried a high risk of adjacent structure involvement (brain, labyrinth, facial nerve).
    • Irradiation fields primarily targeting the temporal bone were associated with a higher incidence of diffuse disease.

    Conclusions:

    • Osteoradionecrosis of the temporal bone exhibits diverse presentations with varying risks to adjacent critical structures.
    • Radiotherapy techniques and field placement significantly influence the pattern and severity of ORN.
    • ORN is a long-term complication that can occur up to twenty years post-radiotherapy, necessitating ongoing surveillance.

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