Background: The prognosis of peritoneal sarcomatosis is generally poor and conventional treatments for this disease process are mostly ineffective. The use of cytoreductive surgery (CRS) with hyperthermic intraperitoneal chemotherapy (HIPEC) as an aggressive locoregional treatment option remains controversial.
Methods: We reviewed 13 patients with peritoneal sarcomatosis who underwent CRS and closed-abdomen HIPEC with cisplatin and doxorubicin between March 2007 and March 2010. None of the patients was diagnosed with GIST or uterine leiomyosarcoma. Both disease-free survival (DFS) and overall survival (OS) were evaluated. Completeness of cytoreduction (CC) and peritoneal cancer index (PCI) were assessed.
Results: There was no operative mortality. Median follow-up was 12 (range, 4–43) months. Peritoneal disease progression occurred in six patients, distant metastases alone in none, and both in two patients. Median DFS and OS were 11 and 12 months, respectively. Completeness of cytoreduction significantly affected survival. Mean DFS and OS in those patients where a CC-0 was achieved was 27.25 ± 5.71 (median, 20) months and 35.25 ± 4.75 months (median, not reached). In contrast, patients with gross residual disease (CC ≥ 1) had a DFS of 4.25 ± 1.43 months (median, 4 months; P = 0.03) and an OS of 5.25 ± 2.36 months (median, 4 months; P = 0.02). In addition, PCI influenced survival when evaluated by univariate analysis. Using multivariate analysis, completeness of cytoreduction was the only covariate influencing overall survival (P = 0.012).
Conclusions: A complete cytoreduction and low PCI score appear to be important factors in considering CRS and HIPEC for patients with peritoneal sarcomatosis.