[Pseudotumor of the breast during a course of acute leukemia]

A case of breast infiltration with neoplasm-like clinical and radiological findings, occurring during acute leukaemia treated with polychemiosteroid therapy is described. Although at histopathological investigation this neoplasm is considered a reticulolymphoblastosarcoma, a personal suggestion that this breast infiltration is a blastic localization is put forward. This observation is a starting point for suggesting that antiblastic polichemio-therapy can change the clinical aspects of acute leukaemia.