Clinical significance of childhood acute myeloid leukemias expressing lymphoid-associated antigens.
The clinical significance of the expression of lymphoid-associated antigens in leukemic cells was studied in 66 children with newly diagnosed acute myeloid leukemia (AML). Among 66 AML cases, 17% were CD7-positive, 15% were CD19-positive, 8% were CD2-positive, and 5% were CD10-positive. In 23 (35%) of the 66 AML cases, at least one lymphoid-associated antigen was expressed in the leukemic cells. When the clinical features and laboratory findings were compared at diagnosis between the 23 Ly+ and the 43 Ly- AML cases, no statistically significant difference was found. The expression of CD34 was significantly more frequent in Ly+ AML cases (91%) than in Ly- AML cases (31%). Chromosomal analysis revealed t(8;21) in 6 of the 21 Ly+ AML cases examined. No other specific chromosome aberration was noted. The 3-year event-free survival rates of Ly+ AML cases and Ly- AML cases were 34% +/- 12% and 26% +/- 8%, respectively. There was no statistically significant difference between the two groups. Further studies are required to determine the prognostic significance of lymphoid-associated antigen expression.
Department of Pediatrics, Aichi Medical University, Nagoya, Japan.
S
S
Kawai
Z
Z
Zha
Y
Y
Yamamoto
H
H
Shimizu
T
T
Fujimoto
D000293:Adolescent; D015703:Antigens, CD / Q000032:analysis*; D000950:Antigens, Ly / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D015470:Leukemia, Myeloid, Acute / Q000276:immunology*; D008297:Male; D011379:Prognosis
D015703:Antigens, CD; D000950:Antigens, Ly