Plain Local School District

A benign neoplasm of the right frontal lobe, and a benign neoplasm of the frontal lobe (laterality not specified) -- count as a single primary because the lateralities are not opposites. A malignant glioma (9380/3) before or after a subependymoma (9383/1) -- count as separate primaries because one is malignant and other isn't. ................
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