Impact of Tumor Growth Speed of Primary Lesions on the Clinical Outcomes of Appendicular Skeletal Metastases

Background/Aim: This study aimed to investigate the clinical influence of the growth speed of primary lesions on appendicular skeletal metastases to provide an optimal treatment strategy for the metastases. Patients and Methods: Fifty-seven patients who underwent surgery for appendicular skeletal metastases between 2008 and 2020 were included. According to the growth speed of primary lesions, the patients were divided into the S group (slow-to-moderate, n=34) and the R group (rapid, n=23), and the outcomes were investigated. Results: The period from diagnosis of skeletal metastases to pathological fracture (PF) was shorter in the R group than in the S group (p=0.24). The overall survival of the S group was significantly better than that of the R group (p=0.02). Conclusion: The appendicular skeletal metastases of the primary tumor with rapid growth speed have a high risk of PFs developed early from the diagnosis of skeletal metastases, and the prognosis may be poor.