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Cancer. 1997 Jun 1;79(11):2251-6.

Intraoperative electron irradiation in the management of pediatric malignancies.

Author information

1
Division of Radiation Oncology, Mayo Clinic, Rochester, Minnesota 55905, USA.

Abstract

BACKGROUND:

External beam irradiation (PBRT), especially in children, is limited by the radiosensitivity of normal tissues. Local control remains a problem in abdominopelvic childhood malignancies. Intraoperative electron irradiation (IOERT) has the potential to increase the dose to the tumor, thereby improving local control, without increasing treatment morbidity.

METHODS:

Between February 1983 and October 1990, 11 children received IOERT as part of a multidisciplinary treatment program for locally advanced primary or recurrent abdominopelvic malignancies. The 7 boys and 4 girls ranged in age from 2-18 years. Tumor histologies included four neuroblastomas, two desmoid tumors, and one each of the following: embryonal rhabdomyosarcoma, synovial cell sarcoma, neurofibrosarcoma, malignant fibrous histiocytoma, and paraganglioma. Single radiation doses of 10-25 grays were delivered using 6-15-megaelectron volt electron beams to 1-5 IOERT fields. All patients also underwent EBRT and six received chemotherapy.

RESULTS:

Eight patients (73%) were alive and disease free at a median follow-up of 99 months (range, 37-126 months). All eight patients who underwent gross total resection were locally controlled. Three patients required surgical intervention for IOERT-related complications and two patients developed neuropathies.

CONCLUSIONS:

IOERT as part of a multidisciplinary treatment approach in patients with locally advanced pediatric malignancies appears to enhance local control in those patients in whom a gross total resection is possible. The long term survival rate was encouraging. Further study, with a larger number of patients, appears warranted to more carefully delineate the efficacy and tolerance of IOERT in the pediatric population.

PMID:
9179074
[Indexed for MEDLINE]

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