Figure 4 (A) Extensive steatosis in a liver specimen from a woman with systemic lupus erythematosus (SLE) (H&E staining). (B) Y‐chromosome‐positive cell (arrow, detail in inset) in the same liver as in (A). Red–brown dot indicates the Y‐chromosome, as identified by in situ hybridisation. (C) Lupus nephritis WHO class II in a renal specimen from a woman with SLE (silver staining). (D) Y‐chromosome‐positive cell (arrow, detail in inset) in the same kidney as in (C).