Survival in synovial sarcoma. A multivariate study of prognostic factors with special emphasis on the comparison between early death and long-term survival.
A retrospective study of 56 patients with synovial sarcoma was done to search for possible prognostic factors affecting survival. In a univariate analysis, age (> or = 20 years), site (proximal), large tumor size (> or = 5 cm), mitotic rate of more than 15 per 10 per high-power fields (hpf), high nuclear grade, tumor necrosis of more than 50%, the presence of rhabdoid cells, a small number of mast cells (< 20/10 hpf), and a high stage according to the criteria of the American Joint Committee (AJC) staging of soft tissue sarcoma, significantly decreased survival (log-rank test; p < 0.05). Moreover, when comparing the 10-year survival (11 patients) and the deaths within 1 year (12 patients), size, high nuclear grade, presence of rhabdoid cells, tumor necrosis, and stage were all considered to be significant prognostic factors (two-sided chi-square test; p < 0.01). In a multivariate analysis (Cox's model), stage was the only strong predictor of a poor prognosis (p = 0.011). We therefore concluded that large tumor size, high nuclear grade, the presence of rhabdoid cells, extensive tumor necrosis, and a high AJC stage were adverse prognostic factors in synovial sarcoma.
Second Department of Pathology, Faculty of Medicine, Kyushu University, Fukuoka, Japan.
Y
Y
Oda
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Hashimoto
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M
Tsuneyoshi
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Takeshita
D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D008940:Mitotic Index; D015999:Multivariate Analysis; D009336:Necrosis; D011379:Prognosis; D012189:Retrospective Studies; D013584:Sarcoma, Synovial / Q000453:epidemiology / Q000401:mortality* / Q000473:pathology; D012983:Soft Tissue Neoplasms / Q000453:epidemiology / Q000401:mortality* / Q000473:pathology; D016019:Survival Analysis; D013997:Time Factors