RESUMO
Little attention has been paid to the fact that intensity modulated radiation therapy (IMRT) techniques do not easily enable treatment with opposed beams. Three treatment plans (3 D conformal, IMRT, and combined (anterior-posterior-posterio-anterior (AP-PA) + IMRT) of 7 patients with centrally-located lung cancer were compared for exposure of lung, spinal cord and esophagus. Combined IMRT and AP-PA techniques offer better lung tissue sparing compared to plans predicated solely on IMRT for centrally-located lung tumors.
Assuntos
Carcinoma Pulmonar de Células não Pequenas/radioterapia , Neoplasias Pulmonares/radioterapia , Lesões por Radiação/prevenção & controle , Planejamento da Radioterapia Assistida por Computador , Radioterapia Conformacional , Radioterapia de Intensidade Modulada , Carcinoma de Pequenas Células do Pulmão/radioterapia , Adulto , Idoso , Esôfago , Feminino , Humanos , Imageamento Tridimensional , Masculino , Pessoa de Meia-Idade , Tratamentos com Preservação do Órgão , Orientação , Prognóstico , Dosagem Radioterapêutica , Medula EspinalRESUMO
Radiotherapy (RT) is our preferred modality for local palliation of metastatic soft tissue sarcoma (STS). A short and intense course of RT is usually needed for rapid palliation and local control of metastatic disease. Seventeen patients at a median age of 61 had symptomatic metastatic sarcoma and required rapid palliation. The symptoms related to the metastases were either pain or discomfort. All patients were treated by a short and intensive course of administration: 39 Gy were given in 13 fractions of 3 Gy/day, 5 times a week. Median follow-up period was 25 weeks. The treatment was well tolerated. Acute side effects included grade one skin toxicity. No wound complications were noted among those undergoing surgery. Late side effects included skin pigmentation and induration of irradiated soft tissues. Durable pain control was achieved in 12 out 15 cases treated for gross metastases. Tumor progression was seen in the 3 other cases within a period of two to nine months. Among 5 lesions which were irradiated as an adjunctive treatment following resection, no local recurrence was observed. The results of this series, although limited in size, point to the safety and feasibility of hypofractionated RT for palliation of musculoskeletal metastases from sarcoma.
