title: Chromosomes and causation of human cancer and leukemia. XXXIV. A case of "hypereosinophilic syndrome" with unusual cytogenetic findings in a chloroma, terminating in blastic transformation and CNS leukemia.
abstract: A 47-year-old white male developed massive hepatosplenomegaly, a pleural effusion, leucocytosis, and a left parasternal mass following a relatively symptom-free persistent hypereosinophilia for about 5 years. Bone marrow aspiration and biopsy and peripheral blood differential showed eosinophilia and a shift to the left with immature cells. A high serum B12 vitamin level and low LAP activity were found. Biopsy of the soft tissue mass revealed a granulocytic sarcoma (chloroma) with a hyperdiploid karyotype (49,XY, + 10, + 15, + 19,3q-), whereas the bone marrow cells had a normal male karyotype. The patient responded temporarily to chemotherapy but eventually developed CNS leukemia and went on to terminate in a frank blastic phase. This case illustrates hypereosinophilia and a myeloproliferative syndrome characterized by a somewhat indolent chronic course evolving into "eosinophilic leukemia" and granulocytic sarcoma, CNS involvement by leukemic cells and, finally, blastic transformation. It is possible that this case represents a variant of Ph1-negative CML to which the term "chronic eosinophilic leukemia" could be justifiably applied.
mesh_terms: D000328:Adult; D002493:Central Nervous System Diseases / Q000235:genetics*; D002869:Chromosome Aberrations; D002900:Chromosomes, Human, 1-3; D002901:Chromosomes, Human, 13-15; D002903:Chromosomes, Human, 19-20; D002906:Chromosomes, Human, 6-12 and X; D004802:Eosinophilia / Q000235:genetics*; D006801:Humans; D007951:Leukemia, Myeloid / Q000235:genetics*; D015470:Leukemia, Myeloid, Acute / Q000235:genetics; D008297:Male; D009196:Myeloproliferative Disorders / Q000235:genetics; D013577:Syndrome