Intravascular large B-cell lymphoma (IVL)

Intravascular large B-cell lymphoma (IVL) is a rare subtype of large B cell lymphoma that is characterized by the proliferation of lymphoma cells
within the lumina of small blood vessels, particularly capillaries and
post-capillary venules, without an obvious extravascular tumor mass or
readily observable circulating lymphoma cells in the peripheral blood.

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