4.O.08 LATE SIDE EFFECTS OF NEOADJUVANT CHEMOTHERAPY AND RADIOTHERAPY IN PATIENTS WITH LOCALIZED EWING’ SARCOMA

Abstract

Prolonged survival have been reached in the last two decades in patients with Ewing’s sarcoma due to combination of chemotherapy and radiotherapy.

We report the analysis of 493 patients treated according to 4 different protocols in 23 years (Jan1983- Dec 2006).Aim of this study was to evaluate the occurrence of late toxicities as Second Malignant Neoplasms (SMN), Cardiomyopathies and sterility.

Methods: We reviewed our database to find out all those patients aged from 1 to 40 yrs with localized Ewing’s sarcoma who were treated with chemotherapy according to 4 different protocols from 1983 to December 2006. Data were updated at Dec 2008

Results: 493 patients had adequate follow up and meet the eligibility criteria. Median age was 16 yrs (1–40) female/male: 183/310.Median overall survival 69 ms (4–302).220 patients died and 273 are alive. 44 pts received HDCT + PBSCR.Eleven SMN were found : 2 AMLeukemia, 2 parotid adenocarcinoma, 1 melanoma, 1 thyroid cancer and 5 radioinduced osteosarcoma. The interval between Ewing’s sarcoma diagnosis and leukaemia diagnosis was shorter then interval between Ewing’s sarcoma and RT osteosarcoma. Six patients reported a Cardiomyopathy : in 4 cases it was mild and pts are well compensated,2 patients needed heart transplant,. One of these two pts received also a kidney transplant due to chronic renal failure due to previous chemotherapy. Fertility: 17 women became pregnant after chemotherapy, 20 women experienced postTx amenorrea: 7 pts received RT in pelvic area, 9 did HDCT, 3 pts were over 30 yrs old. 9 male became father. 8 male patients did sperm analysis 3 azospermia, 4 oligospermia and 1 normal sperm count. No congenital abnormalities in offsprings were reported.

Conclusions: In this casuistic the Cumulative Risk to have a SMN at 5 yrs is 1.8% and 2.9% at 10 yr. The SMN cumulative incidence in Ewing’s sarcoma seems to be lower then in our previous casistic in osteosarcoma patients (ASCO 2006).