PMID- 9283601 OWN - NLM STAT- MEDLINE DCOM- 19970917 LR - 20190816 IS - 0165-4608 (Print) IS - 0165-4608 (Linking) VI - 97 IP - 2 DP - 1997 Sep TI - High frequency of trisomy 8 in acute promyelocytic leukemia: a fluorescence in situ hybridization study. PG - 161-4 AB - Correct diagnosis of acute promyelocytic leukemia (APL) requires proof of the translocation (15;17)(q24;q11), which appears to be absolutely specific for this particular type of myeloid disorder. We studied the karyotypes of 29 consecutive APL patients at diagnosis: in 5 of them banding techniques failed to detect the t(15;17). In these seemingly cytogenetically negative cases, fluorescence in situ hybridization (FISH) with a chromosome 17 painting probe detected a high percentage of mitoses with 3 hybridization signals: one derived from the intact chromosome 17, and 2 from the rearranged chromosomes 15 and 17. Trisomy 8 (+8) as a secondary chromosomal abnormality was observed in 8 cases (27.5%), confirming that the t(15;17) favors the acquisition of an extra chromosome 8. One of these 8 cases showed a marker that was interpreted by FISH analysis as der(8) with duplication of a segment of the long arm carrying the c-MYC allele. Clinical features of patients with t(15;17) and +8 were no different from patients with t(15;17) alone. The usefulness of FISH to standard banding techniques in the detection of specific structural and/or numerical chromosomal abnormalities is confirmed in this report. FAU - Sessarego, M AU - Sessarego M AD - Department of Internal Medicine, D.I.M.I., University of Genoa, Italy. FAU - Fugazza, G AU - Fugazza G FAU - Balleari, E AU - Balleari E FAU - Bruzzone, R AU - Bruzzone R FAU - Ballestrero, A AU - Ballestrero A FAU - Patrone, F AU - Patrone F LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Cancer Genet Cytogenet JT - Cancer genetics and cytogenetics JID - 7909240 SB - IM MH - Adult MH - Chromosome Mapping MH - Chromosomes, Human, Pair 15 MH - Chromosomes, Human, Pair 17 MH - *Chromosomes, Human, Pair 8 MH - Genes, myc MH - Humans MH - *In Situ Hybridization, Fluorescence MH - Middle Aged MH - Translocation, Genetic MH - *Trisomy EDAT- 1997/09/01 00:00 MHDA- 1997/09/01 00:01 CRDT- 1997/09/01 00:00 PHST- 1997/09/01 00:00 [pubmed] PHST- 1997/09/01 00:01 [medline] PHST- 1997/09/01 00:00 [entrez] AID - S0165460896003238 [pii] AID - 10.1016/s0165-4608(96)00323-8 [doi] PST - ppublish SO - Cancer Genet Cytogenet. 1997 Sep;97(2):161-4. doi: 10.1016/s0165-4608(96)00323-8.