“…The diagnosis of discordant lymphoma requires evidence of at least two unique lymphomas in at least two anatomically distinct sites. These sites may be two different lymph nodes, as in our case and others, or may include non-lymphoid tissues such as the nasopharynx, skin, salivary glands, stomach, abdominal cavity, mediastinum, and bone marrow [2,[12][13][14][15][16][17][18]. Because not all lymphoma patients will undergo biopsies at multiple anatomic locations, there is significant potential for under-diagnosis, especially in patients who are asymptomatic or without diffuse lymphadenopathy at presentation.…”