No abstract

The prognosis of patients with axial Ewing's sarcoma is dismal despite an intensive, multimodality approach including multiagent, alternating chemotherapy, surgery and/or radiotherapy. A more aggressive approach should be considered for this group of Ewing's sarcoma patients.

4504 Background: Sequential SUN (tyrosine kinase inhibitor, TKI) until progression of disease (PD) followed by EVE (mTOR inhibitor) is standard therapy for patients with mRCC. This open-label, multicenter, phase II trial compared 1st-line EVE to 1st-line SUN (NCT00903175). Sequential EVE→SUN was also compared with standard SUN→EVE. Methods: Patients with mRCC (clear or non-clear cell) naive to prior systemic therapy were randomized 1:1 to either 1st-line EVE 10 mg/day or SUN 50 mg/day (4 weeks on, 2 weeks off) until PD. Patients then crossed over and continued on the alternate drug until PD. Primary objective was to assess PFS noninferiority of 1st-line EVE to 1st-line SUN; defined as an observed hazard ratio (HR)1st EVE/SUN ≤1.1. Overall survival (OS), combined 1st-line and 2nd-line PFS, and safety were secondary end points. Results: From10/09 to 6/11, 471 patients enrolled (EVE→SUN, n = 238; SUN→EVE, n = 233). Median age was 62 years, 85.4% had clear-cell RCC, and MSKCC favorable/intermediate/poor risk was 30/56/14%. Median follow-up was 22.7 months. A total of 53.7% of patients who discontinued 1st-line EVE entered into 2nd-line SUN and 51.6% of patients who discontinued 1st-line SUN entered into 2nd-line EVE. Median PFS (95% CI) was 7.9 (5.6-8.2) months for 1st-line EVE and 10.7 (8.2-11.5) months for 1st-line SUN. HR1st EVE/1st SUN (95% CI) was 1.43 (1.15-1.77). Median OS (95% CI) was 22.4 (19.7-NA) months for EVE→SUN and 32.0 (20.5-NA) months for SUN→EVE; HREVE-SUN/SUN-EVE (95% CI) was 1.24 (0.94-1.64). A trend in favor of SUN→EVE for OS was observed, but will need to be confirmed with final OS analysis. Additional efficacy results for secondary end points are forthcoming. Common treatment-emergent adverse events for 1st-line EVE vs SUN, respectively, were stomatitis (53% vs 57%), fatigue (45% vs 51%), and diarrhea (38% vs 57%). Conclusions: Noninferiority of PFS for 1st-line EVE compared with SUN was not achieved in this randomized phase II trial of mRCC patients. The treatment paradigm remains SUN→EVE since the sequence achieved optimal clinical benefit. Clinical trial information: NCT00903175.

No abstract

The primary objective of this study is to review the clinical characteristics of 25 patients in the adult and late adolescent age group, diagnosed and treated with small round cell tumors involving soft tissues (extraosseous Ewing sarcoma, rhabdo-myosarcoma, primitive neuroectodermal tumor, and undiffer-entiated small round cell tumors). Additionally, survival and prognostic factors influencing the outcome with multimodality treatment are evaluated. There were 19 males (76%) and 6 females (24%). The median age was 26 years (range: 15-56 years). In 9 patients (36%), the tumor was located at an extremity, whereas 16 patients (64%) had central localizations. Tumor size was larger than 10 cm in 7 patients (29.2%). Six patients (24%) had metastatic disease. Twelve patients (48%) received radiation and 16 patients (64%) underwent surgery. Among the resected tumors, 2 were resected with contaminated margins (12.5%), whereas 2 were radically resected and 12 (75%) were resected with wide margins. All patients were given a median of 4 cycles of multiagent chemotherapy (1-14 cycles). With preoperative chemotherapy, complete regression (CR) of the tumor was achieved in 6 patients (24%). In 4 patients (16%), a partial response was obtained. After the completion of multimodality treatment, 12 patients (48%) had a CR. Progression-free (PFS) and overall survival (OS) for the entire group was 25.0 +/- 10.8% at 1 year and 30.5 +/- 15.5% at 3 years, respectively. Nonmetastatic disease, wide and radical resection, and presence of CR to multimodality treatment were associated with a significantly longer PFS and OS by univariate analysis. By multivariate analysis, CR to multimodality treat-ment was the only independent predictive factor for a longer OS (p: 0.0036, relative risk [RR]: 23.6, 95% CI: 2.8; 198.7) and metastatic presentation was the only independent factor predic-tive for a shorter PFS (p: 0.017, RR. 15, 95% CI: 1.6; 141.2). Large-scale, multicenter studies are required for a better eval-uation of the nonpediatric age group with small round cell tumors.