PMID- 15578619 OWN - NLM STAT- MEDLINE DCOM- 20050418 LR - 20200930 IS - 1552-4825 (Print) IS - 1552-4825 (Linking) VI - 132A IP - 2 DP - 2005 Jan 15 TI - Subtelomeric 6p deletion: clinical, FISH, and array CGH characterization of two cases. PG - 175-80 AB - Thirty patients have been described with cytogenetically visible deletion of the short arm of chromosome 6. However, subtelomeric 6p deletion detected by subtelomeric specific probes has been reported only twice. We report two new patients with terminal 6p deletion detected by subtelomeric screening using fluorescence in situ hybridization (FISH). The two patients exhibited mental retardation, ocular abnormalities, hearing loss, and a characteristic facial appearance. Detailed FISH analyses with probes covering the distal 6p25 region estimated the size of the terminal deletions to approximately 5.5 Mb and approximately 4.8 Mb. Array-based comparative genomic hybridization (array CGH) was used to confirm the cryptic deletions. Most patients with subtelomeric defects lack a characteristic phenotype. However, some of the subtelomeric deletions result in a specific phenotype, which can direct the clinician towards the diagnosis. Submicroscopic 6p deletion appears to be a recognizable clinical phenotype, and this region should be thoroughly investigated with FISH probes, including at least a subtelomeric 6p probe and a probe covering FOXC1, for patients presenting with a characteristic facial appearance, ocular abnormalities, predominantly anterior-chamber eye defects, hearing loss, and mental retardation. FAU - Le Caignec, Cedric AU - Le Caignec C AD - Service de Genetique Medicale, Centre Hospitalo-Universitaire, Nantes, France. lecaignec@hotmail.com FAU - De Mas, Philippe AU - De Mas P FAU - Vincent, Marie-Claire AU - Vincent MC FAU - Boceno, Michelle AU - Boceno M FAU - Bourrouillou, Georges AU - Bourrouillou G FAU - Rival, Jean-Marie AU - Rival JM FAU - David, Albert AU - David A LA - eng PT - Case Reports PT - Comparative Study PT - Journal Article PT - Review PL - United States TA - Am J Med Genet A JT - American journal of medical genetics. Part A JID - 101235741 SB - IM MH - Abnormalities, Multiple/*genetics/pathology MH - Adolescent MH - Child MH - Child, Preschool MH - *Chromosome Deletion MH - Chromosome Mapping MH - Chromosomes, Human, Pair 6/*genetics MH - Eye Abnormalities MH - Face/abnormalities MH - Hearing Loss MH - Humans MH - In Situ Hybridization, Fluorescence MH - Intellectual Disability/pathology MH - Microsatellite Repeats MH - Nucleic Acid Hybridization/methods MH - Telomere/genetics RF - 27 EDAT- 2004/12/04 09:00 MHDA- 2005/04/19 09:00 CRDT- 2004/12/04 09:00 PHST- 2004/12/04 09:00 [pubmed] PHST- 2005/04/19 09:00 [medline] PHST- 2004/12/04 09:00 [entrez] AID - 10.1002/ajmg.a.30409 [doi] PST - ppublish SO - Am J Med Genet A. 2005 Jan 15;132A(2):175-80. doi: 10.1002/ajmg.a.30409.