The Residual Mediastinal Mass Following Radiation Therapy for Hodgkinʼs Disease

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Abstract
Thirty-two patients with mediastinal involvement by Hodgkin's disease (HD), treated with an isocentric technique of extended-field radiation therapy (RT) with or without chemotherapy, are described. Twenty-nine patients (91%) had a complete response to therapy and four patients subsequently relapsed, with a median follow-up of 54 months. Five of seven patients not in continuous complete remission were salvaged, with one additional salvage therapy. Ten patients had persistent mediastinal masses at 1 year, following completion of planned therapy; only one of these has had recurrent disease. Of those who achieved complete response, only one patient has had disease recurrence in the mediastinum. We conclude that extended-field RT, using an isocentric technique, provides excellent local disease control in HD; however, persistent mediastinal widening after therapy is frequent, and additional therapy should not be given in the absence of conclusive evidence of disease progression.

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