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Kaplan-Meier analysis of pulmonary metastasis by grade and diagnosis compares (A) all sarcomas by grade, (B) OSA by grade, (C) CSA by grade, and (D) all other sarcomas (non-OSA or CSA) by grade. Rates of metastasis were greater in higher grade sarcomas (log-rank p < 0.001) and in Grade 2 OSA compared with Grade 2 CSA (log-rank p = 0.006)
