The interstitial deletion of bands q33-35 of long arm of chromosome 7: a review with a new case report.
Interstitial or terminal deletion resulting in partial monosomy of various segments of the long arm of chromosome 7 was first recorded over two decades ago. Since then, a number of reports have correlated the severity of clinical manifestations with the length of the deletion involved. However, difficulty remains in defining a so-called "distinct syndrome". We present a new case with the shortest interstitial deletion of the long arm of chromosome 7 bands q33-35, i.e. 46,XX,del(7)(pter----q33::q35----qter). A 4-year-old black female was referred for cytogenetic evaluation due to neurodevelopmental delay. Pertinent physical examination at birth was cleft lip and cleft palate which required corrective surgery. At 2 years of age, a myringotomy tube was inserted for repeated ear infection and a hearing aid was required for conductive deafness. Neurological examination revealed poor eye contact, and severe mental and motor retardation. We reviewed 21 cases of a partial interstitial deletion of varied segments of the long arm of chromosome 7, but we were unable to establish a definite relationship with the deletion of various 7q segments with any specific clinical manifestations.
Verma
R S
RS
Division of Genetics, Long Island College Hospital Suny Health Science Center, Brooklyn, N.Y. 11201.
Conte
R A
RA
Sayegh
S E
SE
Kanjilal
D
D
D000328:Adult; D002675:Child, Preschool; D002869:Chromosome Aberrations / Q000235:genetics*; D002872:Chromosome Deletion; D025063:Chromosome Disorders; D002897:Chromosomes, Human, Pair 7; D005260:Female; D006801:Humans; D007621:Karyotyping; D008297:Male