Features of pain syndrome in patients with bone metastasis
Purpose. The purpose of the current study was the search for evaluation criterion for the radiosensitivity of bone metastases of various origins. Materials and methods. The first part of the study presents a modern classification of pain, method of its evaluation, mechanisms and features of metastatic bone pain. The radiobiological patterns of pain relief in low-dose anti-inflammatory radiation therapy were also considered. The analysis of these features testifies in favor of the antitumor mechanism of pain relief in high-dose irradiation. To identify the relationship between pain and other clinical symptoms, 810 cases of bone metastases of various localization and morphology were analyzed. Results. The severity of pain directly correlates with gender, lesion length and little affected by the presence of pathological fracture. The intensity of pain does not depend on the primary tumor and bone metastases localization and does not correlate with the presence of neurological deficit. Conclusion. Completeness and persistence of the analgesic effect may reflect the real radiosensitivity of bone metastases, but taking into account the patient's gender and lesion length in the irradiated area.