14q11 abnormality and trisomy 8q are not common in Japanese T-cell prolymphocytic leukemia.
We studied ten cases of Japanese T-cell prolymphocytic leukemia (T-PLL) collected over the last 9 years. Median age was 61 years with a male predominance (M:F, 8:2). The main disease features were splenomegaly, lymphadenopathy, hepatomegaly, skin lesions and serous effusions. The clinical course was progressive with a median survival of 10 months. Immunophenotyping showed that the prolymphocytes had a post-thymic phenotype (TdT-, CD1a-, CD2+, CD3+, CD5+, CD7+) with a predominant CD4+ immunophenotype. Cytogenetic analysis showed no consistent abnormalities. 14q abnormality and trisomy 8q, which are frequently seen in T-PLL of Western countries, were found in only two and zero cases, respectively. We conclude that the clinical and biological characteristics of T-PLL in Japan are almost the same as those in Western countries. However, the cytogenetic findings of T-PLL in Japan might be different.
Kojima
K
K
Division of Hematology, Ehime Prefectural Central Hospital, Japan.
Kobayashi
H
H
Imoto
S
S
Nakagawa
T
T
Matsui
T
T
Kawachi
Y
Y
Oda
K
K
Yano
T
T
Kobayashi
H
H
Noguchi
M
M
Hara
M
M
Oshimi
K
K
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D002869:Chromosome Aberrations / Q000235:genetics*; D025063:Chromosome Disorders; D002883:Chromosomes, Human, Pair 14; D002898:Chromosomes, Human, Pair 8; D005260:Female; D006801:Humans; D007564:Japan; D015463:Leukemia, Prolymphocytic / Q000235:genetics*; D015458:Leukemia, T-Cell / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D014314:Trisomy