Pulmonary and dermal manifestations of myelosarcoma with delayed onset of acute myeloid leukemia.
An unusual case of illness of a 49 year old woman who suffered from inexpressive skin rash for three years is described. Repeated biopsies did not bring an unequivocal result. Then an illness followed with a short term fever, prolonged cough, and progressing dissemination of tiny focal shadows of infiltration character in both lungs. Simultaneous biopsies of the skin and excised pulmonal tissue revealed histiocytolymphocytic infiltrations of an identical character. Atypical cells which were difficult to classify were present. Dermal and pulmonal infiltrations disappeared after chemotherapy. Eruption occurred again after a year and hasty development of acute myeloid leukemia started. It was a case of prodromal myelosarcoma stage with skin and pulmonal infiltration by quite undifferentiated reticulohistiocytic elements of the myeloid line, which ended as acute myeloid leukemia after 4 years.