Usually non-Hodgkin's lymphoma: Large nodes, enlargement of Waldeyer's ring, extra lymphatic enlargement of particular glands such as the thyroid.
Hodgkin's lymphoma may be present (25 percent of head & neck lymphoma) particularly if there is also a mediastinal involvement.
Lymphomas can cross fascial planes easily.
Can undergo rapid enlargement.
Differential diagnosis: squamous cell cancer, infectious mononucleosis.