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Radiation effects on the external auditory canal.

M Adler, M Hawke, G Berger

    The Journal of Otolaryngology
    |August 1, 1985
    PubMed
    Summary
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    Radiation therapy for head and neck tumors can damage the temporal bone. Histopathology revealed significant bony and soft tissue changes in the external auditory canal, potentially causing chronic otitis externa.

    Area of Science:

    • Otolaryngology
    • Radiation Oncology
    • Pathology

    Background:

    • Radiation therapy is a common treatment for head and neck cancers.
    • The temporal bone, including the external auditory canal, can be inadvertently exposed to radiation during treatment.
    • Understanding the histopathological effects of radiation on the temporal bone is crucial for managing patient complications.

    Purpose of the Study:

    • To investigate the histopathological changes in the external auditory canal of temporal bones following therapeutic radiation for head and neck tumors.
    • To correlate observed pathological findings with potential clinical manifestations.

    Main Methods:

    • Histopathological examination of 13 temporal bones from 10 patients who received radiation therapy for head and neck tumors.

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  • Categorization of observed changes into bony and soft tissue alterations.

    • Main Results:

    • Bony changes included resorption, fibrosis, empty lacunae, and sequestration.
    • Soft tissue changes comprised secondary cholesteatoma formation, epithelial ulceration with bone resorption, epithelial thickening, subepithelial fibrosis, and atrophic ceruminous glands.
    • These changes can clinically present as persistent otitis externa, otorrhea, and otalgia.

    Conclusions:

    • Therapeutic radiation for head and neck tumors induces significant histopathological changes in the external auditory canal.
    • These radiation-induced changes can lead to chronic otitis externa and associated symptoms.
    • Further research may explore preventative strategies or management of these complications.