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A) Axial multiplanar reconstruction (MPR) MR image obtained at time of SRS for treatment of recurrent PCNSL tumor in the left aspect of the genu of the corpus callosum. B) The tumor volume was 0.1 cm3 and was treated to a margin dose of 20 Gy (Yellow=20 Gy, Green=12 Gy). C) Post-SRS MPR MR image 8 months later demonstrates complete regression of tumor.
