Assertion: follicular lymphoma | /r/AtLocation | 1 lymph node group
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Source sentences:
text: If treatment is needed for follicular lymphoma that is only in 1 lymph node group or in 2 nearby groups that are both above or below the diaphragm (the thin muscle separating the chest from the abdomen), the preferred treatment is radiation therapy to the lymph node areas affected by lymphoma (called involved site radiation).