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Trisomy 8 as sole cytogenetic abnormality in a case of chronic lymphocytic leukemia
Lai-Ching Lau1, Su-Keyau Kee, Sim-Leng Tien
1Department of Pathology, Singapore General Hospital, Outram Road, Singapore 169608.
Abstract:
A 49-year-old man, who had been diagnosed with chronic lymphocytic leukemia (CLL) in 2002, had a normal karyotype in his bone marrow. Trisomy 8 was demonstrated in his peripheral blood in 2005. Fluorescence in situ hybridization using an LSI CEP 8 probe performed on the archival bone marrow specimen showed three hybridization signals in 40% of 200 interphase cells scored. This confirmed that the trisomy 8 abnormality was present in both the blood and bone marrow samples. Trisomy 8 as the sole chromosomal abnormality in CLL is a very rare finding. The prognostic significance of trisomy 8 in CLL remains to be seen.
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