Abscopal effect of radiation on lung metastases of XXXX : a case report.

@entity1 @entity96 @entity5 @entity2 @entity1416 @entity3 @entity157
INTRODUCTION: The abscopal effect is the effect of radiation therapy at a site distant to the area of irradiation. This is not a common event and has not been clearly defined, resulting in few reported cases in the literature. We discuss this phenomenon in a @entity1 with @entity157 . CASE PRESENTATION: A 63-year-old Japanese @entity1 underwent extended right @entity96 . During his follow-up examination, a single lung @entity3 and a single mediastinal lymph node @entity3 were found. Trans-catheter @entity1416 was initially attempted to treat the @entity5 , however this approach failed to take effect and carried risks of @entity1416 . External-beam irradiation, with a dose of 2.25 Gy per fraction, was performed using an antero-posterior parallel-opposed technique (total dose, 60.75 Gy). A computed tomography scan performed one month after starting radiotherapy showed a remarkable reduction of the mediastinal lymph node @entity3 . In addition to this, we observed spontaneous shrinking of the lung @entity3 , which was located in the right lower lobe and out of the radiation field. No chemotherapy was given during the period. There has been no recurrence of either the lung @entity3 or the mediastinal lymph node @entity3 during a follow-up 10 years after the radiotherapy. CONCLUSION: We observed a rare abscopal effect in a site distant from the area of irradiation. Irradiation of the mediastinum resulted in @entity5 mass regression in the untreated @entity2 .
