Trisomy 10 in acute myeloid leukemia: Three additional cases from the database of the Japan Adult Leukemia Study Group (JALSG) AML-92 and AML-95

To clarify the clinical and hematologic features of a rare numerical chromosome abnormality, we searched for trisomy 10 in acute myelogenous leukemias (AMLs) using the database of the Japan Adult Leukemia Study Group (JALSG) AML 92 and 95. Among the sequentially registered patients of JALSG-AML 92 (655 patients) and JALSG-AML 95 (531 patients), chromosome results were obtained in 1,074 patients (90.6%), and we found 3 patients with trisomy 10 as a sole abnormality. The first patient had an AML-M1 morphology with CD7 antigen; the patient obtained complete remission (CR) with the first course of chemotherapy. The second patient had an AML-M1 morphology without expressing CD7 antigen; this patient obtained CR, but relapsed 3 months later, and underwent allogeneic bone marrow transplantation. He suffered from chronic graft-versus-host disease and expired 38 months after the AML diagnosis. The third patient had AML-M0 with CD7 positivity. He obtained CR; however, brain abscess and cerebral hemorrhage occurred. In the literature, the mean age of patients with trisomy 10 AML is 57.8 years, the gender ratio is M/F = 1.5, and the frequency of M0/M1/M2 is 85.7%. A high incidence (81.8%) of CD7 expression of leukemia cells is notable. About 73% of patients survived for greater than 12 months. (C) 2000 Elsevier Science Inc. All rights reserved.