BACKGROUND: Locoregional recurrence of a retroperitoneal soft tissue sarcoma (RSTS) may offer a second chance of curative surgical treatment. In a population-based study the proportion of patients developing isolated locoregional recurrences (LR) was determined and the outcome of these patients was analysed. METHOD: In a retrospective nationwide study, data were collected on 142 patients treated between 1 January 1989 and 1 January 1994 for primary RSTS. In patients who had been treated radically for their primary sarcoma (77/142, 54%), the pattern of recurrence was evaluated. Factors predictive of survival for patients with LR were studied. RESULTS: After a median follow-up of 86 (range 60-101) months, 32 patients (42%) had developed LR, and distant metastasis (DM) had been diagnosed in 17 patients (22%). Median disease-free interval between the initial operation and the establishment of LR or DM was 22 and 19 months, respectively. Five-year cumulative survival of patients with established LR was 37% in comparison with 11% for patients with DM (P=0.062). Factors predictive of favourable outcome in patients with LR were the absence of multifocal recurrence (n=13 P=0.01), lipomatous histomorphology (n=20 P=0.02), and a complete resection of recurrent sarcoma (n=17 P=0.04). CONCLUSION: After a median follow-up of 7 years following radical treatment of a primary RSTS, 42% of the patients had developed isolated locoregional recurrences. A complete resection of recurrent disease, lipomatous histomorphology and the absence of multifocal growth influenced prognosis favourably. Copyright 2001 Harcourt Publishers Limited.
BACKGROUND: Locoregional recurrence of a retroperitoneal soft tissue sarcoma (RSTS) may offer a second chance of curative surgical treatment. In a population-based study the proportion of patients developing isolated locoregional recurrences (LR) was determined and the outcome of these patients was analysed. METHOD: In a retrospective nationwide study, data were collected on 142 patients treated between 1 January 1989 and 1 January 1994 for primary RSTS. In patients who had been treated radically for their primary sarcoma (77/142, 54%), the pattern of recurrence was evaluated. Factors predictive of survival for patients with LR were studied. RESULTS: After a median follow-up of 86 (range 60-101) months, 32 patients (42%) had developed LR, and distant metastasis (DM) had been diagnosed in 17 patients (22%). Median disease-free interval between the initial operation and the establishment of LR or DM was 22 and 19 months, respectively. Five-year cumulative survival of patients with established LR was 37% in comparison with 11% for patients with DM (P=0.062). Factors predictive of favourable outcome in patients with LR were the absence of multifocal recurrence (n=13 P=0.01), lipomatous histomorphology (n=20 P=0.02), and a complete resection of recurrent sarcoma (n=17 P=0.04). CONCLUSION: After a median follow-up of 7 years following radical treatment of a primary RSTS, 42% of the patients had developed isolated locoregional recurrences. A complete resection of recurrent disease, lipomatous histomorphology and the absence of multifocal growth influenced prognosis favourably. Copyright 2001 Harcourt Publishers Limited.
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