PMID- 16719278 OWN - NLM STAT- MEDLINE DCOM- 20061016 LR - 20061115 IS - 1015-8146 (Print) IS - 1015-8146 (Linking) VI - 17 IP - 1 DP - 2006 TI - Spectral karyotyping and fluorescence in situ hybridization analysis of de novo partial trisomy 7p (7p21.2-->pter) and partial monosomy 12q (12q24.33-->qter). PG - 57-63 AB - An 8-year-old boy presenting with hypotonia, moderate mental retardation, developmental delay, and psychomotor retardation is reported. Magnetic resonance imaging of the brain at age 3 years revealed a Dandy-Walker variant. Cytogenetic analysis of the peripheral blood revealed a derivative chromosome 12 with unknown additional material attached to the distal region of the long arm of chromosome 12. The parental karyotypes were normal. Spectral karyotyping (SKY) using the 24-color SKY probes and fluorescence in situ hybridization (FISH) using the specific 7p, 7q, 12p, and 12q telomeric probes confirmed a duplication of distal 7p and a deletion of terminal 12q. The karyotype of the proband was designated as 46,XY.ish der(12)t(7;12) (p21.2;q24. 33)(SKY+, 7pTEL+, 12qTEL-). The present case provides evidence for the association of partial trisomy 7p (7p21.2-->pter) and partial monosomy 12q (12q24.33-->qter) with a cerebellar malformation and the usefulness of SKY and FISH in the identification of a de novo aberrant chromosome resulting from an unbalanced translocation. FAU - Chen, C P AU - Chen CP AD - Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan, Republic of China. cpc_mmh@yahoo.com FAU - Lin, S P AU - Lin SP FAU - Lin, C C AU - Lin CC FAU - Li, Y C AU - Li YC FAU - Hsieh, L J AU - Hsieh LJ FAU - Huang, J K AU - Huang JK FAU - Lee, C C AU - Lee CC FAU - Wang, W AU - Wang W LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Switzerland TA - Genet Couns JT - Genetic counseling (Geneva, Switzerland) JID - 9015261 SB - IM MH - Child MH - Chromosome Painting MH - Chromosomes, Human, Pair 12/*genetics MH - Chromosomes, Human, Pair 7/*genetics MH - Dandy-Walker Syndrome/*genetics/pathology MH - Genetic Counseling MH - Humans MH - In Situ Hybridization, Fluorescence MH - Karyotyping MH - Male MH - *Monosomy MH - Translocation, Genetic MH - *Trisomy EDAT- 2006/05/25 09:00 MHDA- 2006/10/17 09:00 CRDT- 2006/05/25 09:00 PHST- 2006/05/25 09:00 [pubmed] PHST- 2006/10/17 09:00 [medline] PHST- 2006/05/25 09:00 [entrez] PST - ppublish SO - Genet Couns. 2006;17(1):57-63.