Resumen

ALERT SILVA, José et al. Intensity Modulated Radiotherapy in treatment of tumors in children. Rev Cubana Pediatr [online]. 2011, vol.83, n.2, pp. 207-214. ISSN 1561-3119.

INTRODUCTION. The intensity modulated radiotherapy (IMRT) is a high performance technique based on the three-dimensional volumetric definition of tumor anatomy and of critical organs or at risk. To assure the possibility to apply the IMRT in Cuba in selected cases of tumors in children and adolescents, authors designed a research project whose results are documented in present report. METHODS. The first irradiations with IMRT in Cuban children and adolescents aged between 6 -18 were carried out. The technique used is that based on the geometric openings and inverse optimization. Irradiations were applied using a linear accelerator with 6 MV photons, with multileaf collimator. Doses administered varied according to the type of tumor, the radiotherapy standards and the presence of critical organs. All patients were assessed weekly with radiologic controls using electronic portal plates. RESULTS. Irradiated patients (5) had the following tumors: non-Hodgkin lymphoma of maxillary sinus (1), brain stem glioma (1), non-Hodgkin abdominal lymphoma (1), parameningeal mesenchymatous chondrosarcoma (1) and parameningeal hemangiopericytoma (1). Doses of radiation applied varied between 24 and 62 Gy. Between 5 and 8 fields were used with variations among 10 and 20 segments. CONCLUSIONS. In Cuba the first irradiations with IMRT in children and adolescents and its use must to be spreading to those cases where its usefulness is greater.

Palabras clave : Modulated intensity radiotherapy; MIRT; tumor; Pediatrics; Cuba.

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