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2017 ; 17
(1
): 420
Nephropedia Template TP
gab.com Text
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Twit Text #
English Wikipedia
What is the impact of local control in Ewing sarcoma: analysis of the first
Brazilian collaborative study group - EWING1
#MMPMID28619077
Becker RG
; Gregianin LJ
; Galia CR
; Jesus-Garcia Filho R
; Toller EA
; Badell G
; Nakagawa SA
; David A
; Baptista AM
; Yonamime ES
; Serafini OA
; Penna V
; Santos JFC
; Brunetto AL
BMC Cancer
2017[Jun]; 17
(1
): 420
PMID28619077
show ga
BACKGROUND: Relapse in localized Ewing sarcoma patients has been a matter of
concern regarding poor prognosis. Therefore, we investigated the impact of local
control modality (surgery, surgery plus radiotherapy, and radiotherapy) on
clinical outcomes such as survival and recurrence in patients with non-metastatic
Ewing sarcoma treated on the first Brazilian Collaborative Group Trial of the
Ewing Family of Tumors (EWING1). METHODS: Seventy-three patients with localized
Ewing sarcoma of bone aged 30 years were included. The treating physicians
defined the modality of local control based on the recommendations of the
coordinating center and the patient and tumor characteristics. Possible
associations of local control modality with local failure (LF), disease-free
survival (DFS), event-free survival (EFS), overall survival (OS), and clinical
characteristics were analyzed. RESULTS: Mean patient age was 12.8 years (range, 2
to 25 years) and median follow-up time was 4.5 years (range, 2.3 to 6.7 years).
Forty-seven patients underwent surgery, 13 received radiotherapy, and 13 received
both. The 5-year EFS, OS, and DFS for all patients was 62.1%, 63.3%, and 73.1%,
respectively. The 5-year cumulative incidence (CI) of LF was 7.6% for surgery,
11.1% for radiotherapy, and 0% for postoperative radiotherapy (PORT) (p = 0.61).
The 5-year EFS was 71.7% for surgery, 30.8% for radiotherapy, and 64.1% for PORT
(p = 0.009). CONCLUSIONS: There was a significant effect of local control
modality on EFS and OS in the study. Surgery and PORT modalities yielded very
close results. The group treated with radiotherapy alone had considerably worse
outcomes. This may be confounded by greater risk factors in these patients. There
was no significant effect of local control modality on the CI of LF and DFS.