[Aplastic anaemia and thymonal].

The combination of aplastic anaemia and thymona was observed in a 49-year old woman. Concomitant with severe normochromic anaemia and reticulocytopenia was a cell-rich bone marrow smear in which erythropoietic precursors were almost absent. Immunological phenomena could not be demonstrated. The erythropoietin level was maximally increased. Pathological anatomy typically revealed a predominantly spindle-cell thymonal with only minor capsular invasion.