Lymphocytic infiltration of the skin Jessner-Kanof. This rather well circumscribed, symptomless, quite solid plaque-like consolidation usually appears in light-exposed skin areas, especially in the face. It may turn lighter in the centre to form a ring-shaped lesion but will not be scarred. Biopsy shows a typical dense accumulation of lymphocytes. The histological picture is different from a lymphocytoma caused by Borrelia infection. This lymphocytoma was cured with a corticosteroid injection. They may also heal spontaneously.