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Pathological tissue changes following intraoperative radiotherapy.

W F Sindelar, H Hoekstra, C Restrepo

    American Journal of Clinical Oncology
    |December 1, 1986
    PubMed
    Summary
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    Intraoperative radiotherapy for advanced malignancies caused radiation-related fibrosis in tissues like retroperitoneal soft tissues and bone marrow. Major organs like blood vessels, intestine, and ureter showed minimal damage.

    Area of Science:

    • Oncology
    • Radiation Oncology
    • Surgical Pathology

    Background:

    • Advanced-stage malignancies pose treatment challenges.
    • Surgical resection combined with radiotherapy is a treatment modality.
    • Assessing long-term treatment effects is crucial.

    Purpose of the Study:

    • To evaluate histological changes and radiation damage in patients treated with surgical resection and intraoperative radiotherapy.
    • To identify specific tissue responses to radiation in various advanced cancers.

    Main Methods:

    • Ninety patients with advanced malignancies underwent surgical resection and intraoperative radiotherapy.
    • Some patients received additional external beam radiotherapy.
    • Detailed autopsies were performed on 22 deceased patients to assess radiation damage.

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    Main Results:

    • Radiation-induced fibrosis was the predominant histological change.
    • Mild fibrosis in retroperitoneal soft tissues and hypocellularity in bone marrow were noted in pancreatic/gastric cancers and sarcomas.
    • Perineural fibrosis was observed in pelvic/retroperitoneal nerves for sarcomas and pancreatic cancer.
    • Major blood vessels, intestine, and ureter showed minimal radiation effects.
    • Intact irradiated tumors exhibited necrosis.

    Conclusions:

    • Intraoperative radiotherapy can lead to significant fibrosis in specific tissues.
    • Certain anatomical sites and tumor types show distinct radiation responses.
    • Radiation damage appears manageable in major organs, but localized fibrosis is a notable effect.