Cutaneous MALT-lymphoma: from cutaneous immunocytoma and pseudolymphoma to the current (and future) conceptions.

The current report examines the evolution of the concepts of immunocytoma and pseudolymphoma in a historical perspective, paying special attention to their evolvement into the groups of marginal-zone lymphoma and cutaneous MALT-lymphoma. It also examines the current conception of the existence of at least two types of cutaneous MALT-lymphomas and their relation to the duality immunocytoma/pseudolymphoma from the old literature.