PMID- 9797774 OWN - NLM STAT- MEDLINE DCOM- 19981104 LR - 20190816 IS - 0165-4608 (Print) IS - 0165-4608 (Linking) VI - 106 IP - 2 DP - 1998 Oct 15 TI - Complex structural involvement of chromosome 7 in primary myelodysplastic syndromes determined by fluorescence in situ hybridization. PG - 110-5 AB - Cytogenetic analysis of 72 consecutive de novo myelodysplastic syndrome patients revealed monosomy 7 in 12 cases. In 4 of these cases, the -7 was the only abnormality, whereas the remaining 8 cases showed additional chromosomal aberrations. Fluorescence in situ hybridization (FISH) utilizing chromosome 7 alpha-satellite and painting probes and other specific probes, when necessary, provided evidence of unusual and unsuspected structural rearrangements involving chromosome 7. FISH analysis showed that the small fragment found in one patient and the ring found in each of two other patients were chromosome 7-derived rings. FISH also revealed the insertion of chromosome 7 sequences into autosomes in three other patients and unusual translocations in the remaining two patients. By comparing the results obtained by using banding techniques to those obtained by using the FISH technique, we deduced the involvement of chromosome 7 with partial deletion of the short arm in all eight examined patients. Our study confirms the ability of FISH to detect chromosomal aberrations that would otherwise not be identified and the tendency of chromosome 7 to be involved in many different rearrangements. From a clinical point of view, we confirm that patients affected by myelodysplastic syndromes with complex karyotypes involving chromosome 7 do not respond to treatment and have a poor prognosis. FAU - Sessarego, M AU - Sessarego M AD - Department of Internal Medicine, University of Genoa, Genoa, Italy. FAU - Fugazza, G AU - Fugazza G FAU - Gobbi, M AU - Gobbi M FAU - Bruzzone, R AU - Bruzzone R FAU - Bisio, R AU - Bisio R FAU - Ghio, R AU - Ghio R 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 - Anemia, Refractory, with Excess of Blasts/*genetics MH - *Chromosome Aberrations MH - Chromosome Banding MH - *Chromosomes, Human, Pair 7 MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Myelodysplastic Syndromes/*genetics EDAT- 1998/11/03 00:00 MHDA- 1998/11/03 00:01 CRDT- 1998/11/03 00:00 PHST- 1998/11/03 00:00 [pubmed] PHST- 1998/11/03 00:01 [medline] PHST- 1998/11/03 00:00 [entrez] AID - S0165460898000867 [pii] AID - 10.1016/s0165-4608(98)00086-7 [doi] PST - ppublish SO - Cancer Genet Cytogenet. 1998 Oct 15;106(2):110-5. doi: 10.1016/s0165-4608(98)00086-7.