Chromosomal abnormalities in T-cell large granular lymphocyte leukaemia: report of two cases and review of the literature.
Cytogenetic information on T-cell large granular lymphocyte leukaemia (T-LGL; large granular lymphocytosis) is limited. We report two cases of T-LGL with unusual karyotypic aberrations. The first case showed a novel inv(7)(p15q22) as the sole chromosomal abnormality, while the second case showed an inv(14)(q11q32) with evidence of clonal evolution. The breakpoints 7p14-p15 and 14q11 coincide with the T-cell receptor (TCR)-gamma and TCR-alpha/TCR-delta gene loci respectively. This is the first report describing the possible involvement of T-cell receptor genes in karyotypic aberrations in T-LGL.
Wong
K F
KF
Department of Pathology, Queen Elizabeth Hospital, Hong Kong SAR, China. kfwong@ha.org.hk
Chan
J C W
JC
Liu
H S Y
HS
Man
C
C
Kwong
Y L
YL
D000328:Adult; D002869:Chromosome Aberrations; D002883:Chromosomes, Human, Pair 14 / Q000235:genetics; D002897:Chromosomes, Human, Pair 7 / Q000235:genetics; D005260:Female; D006801:Humans; D007621:Karyotyping; D015458:Leukemia, T-Cell / Q000235:genetics*; D008875:Middle Aged; D016693:Receptors, Antigen, T-Cell, alpha-beta / Q000235:genetics; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000235:genetics
D016693:Receptors, Antigen, T-Cell, alpha-beta; D016692:Receptors, Antigen, T-Cell, gamma-delta