| http://www.w3.org/ns/prov#value | - : Orbital adnexal lymphoma extending beyond orbit to adjacent structures such as bone and brainT4a: Involvement of nasopharynxT4b: Osseous involvement (including periosteum)T4c: Involvement of maxillofacial, ethmoidal and/or frontal sinusesT4d: Intracranial spreadN categories:NX: Regional lymph nodes cannot be assessedN0: No evidence of lymph node involvementN1: Involvement of ipsilateral regional
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