Second primary malignancy (SPM) significantly impacts the survival and prognosis of patients. This study endeavors to identify risk and prognostic factors associated with SPM after first primary kidney cancer and construct predictive nomograms.
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Developing a second primary malignancy (SPM)
Timeframe: This time was calculated as the time interval from the diagnosis of first primary kidney cancer to the diagnosis of second primary malignancy, assessed up to 20 years.
Overall survival (OS)
Timeframe: From the date of diagnosis of the second primary malignancy to the date of death from any cause or the data of last follow-up, whichever came first, assessed up to 20 years.