Abstract: | We report a case of systemic lupus erythematosus (SLE) associated with intravascular (angiotropic) lymphoma. A 27‐year‐old woman had been suffering from uncontrolled severe eruptions for a long time and was admitted because of high fever due to hemophagocytic syndrome (HPS). As her SLE had not been well‐controlled by moderate doses of steroids and azathioprine, autoimmune associated HPS was first considered. She was initially treated with steroid pulses and γ‐globulin for HPS. However, chromosomal analysis of bone marrow cells revealed severe abnormalities. After malignant lymphoma‐associated HPS was diagnosed, chemotherapy was commenced in the intensive care unit with artificial respiration and continuous hemodiafiltration. The patient died of cerebral infarction at day 45. It is suggested that the SLE itself was associated with the development of the intravascular lymphoma rather than due to the azathioprine. |