Jacobsen syndrome: Chromosome deletion at llq23
Daniel R Clang1, Richard J LaBaere Ii
1Faculty, Family Practice Residency Program, McLaren Regional Medical Center, G-3245 Beecher Rd, flint, Ml48532 . USA.
Abstract:
A male infant delivered at term to unrelated parents was found to have multiple dysmorphic facial characteristics, abnormal head shape, anemia, thrombocytopenia, a prominent holosystolic heart murmur with multiple cardiac defects, hypotonia, and was small for his gestational age. Karotype revealed a de novo deletion of the long arm of chromosome 11, del (11 )(q23), which has been previously described as Jacobsen syndrome. Recent studies have demonstrated that a folate-sensitive fragile site at 11q, band 23, (1lq23) may be responsible for this deletion and possibly other syndromes as well.
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