Abstract
Background: Dedifferentiated liposarcomas (DDLPSs) result in worse patient outcomes than well-differentiated tumors despite shared molecular derangements. Prevalence and pattern of DDLPS systemic metastases have not been extensively reported; information regarding diagnosis, treatment, and outcomes of metastatic DDLPS patients is limited. Our study seeks to address this knowledge gap. Methods: Metastatic patients were identified from a clinical database consisting of 277 DDLPS patients treated at the University of Texas M D Anderson Cancer Center (UTMDACC) (1993-2010). Only patients with radiologically demonstrable distant metastases were included. Patient, tumor, treatment, and outcome variables were recorded. Available imaging studies and tumor FFPE blocks were assessed. Results: A total of 40 patients were identified, translating into a DDLPS metastatic rate of 14% (17% for de novo DDLPS and 9% for secondary dedifferentiation). The average patient age was 61 years with a male predilection. The retroperitoneum and lungs were the most common primary and metastatic tumor sites. Any of the 4 described DDLPS morphological subtypes harbored metastatic potential; MFH/UPS-like morphology was the most common. The median time from primary diagnosis to metastasis was 25 months; more than 50% of metastases developed without local failure. The median survival of metastatic patients was 11.5 months; the 5-year DSS was 5.2%. Patients amenable to complete surgical extirpation (n = 14) faired significantly better (P = .001; log rank). Conclusions: Metastatic spread is an ominous consequence of DDLPS, especially regarding de novo tumors. Occurring relatively early in the course of disease and exhibiting a pulmonary predilection, these lesions are highly aggressive and commonly fatal. Further studies to identify metastatic biomarkers are needed.
Original language | English (US) |
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Pages (from-to) | 3762-3770 |
Number of pages | 9 |
Journal | Annals of surgical oncology |
Volume | 18 |
Issue number | 13 |
DOIs | |
State | Published - Dec 2011 |
ASJC Scopus subject areas
- Surgery
- Oncology