VASCULAR IMMUNE DEPOSITS IN A LYMPH NODE OF A PATIENT WITH SYSTEMIC LUPUS ERYTHEMATOSUS
A biopsy specimen of the lymph node of a 38-year-old woman with systemic lupus erythematosus was studied with immunofluorescent staining, and tissue bound IgG, IgM, C3, and plasminogen were demonstrated in vessel walls. The skin revealed no deposits of these elements at dermo-epidermal junction and in vessel walls. Circulating immune complexes in the serum were detected by the Raji cell test. This case indicates that lymph node biopsy gives us chance to observe those deposits in vessel walls of the patient with systemic lupus erythematosus when immunofluorescent staining of skin is negative.