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  • Title: Tetrasomy 9q in an infant with cleft palate and multiple anomalies.
    Author: McPherson E, Neiswanger K, Surti U.
    Journal: Clin Dysmorphol; 2005 Jul; 14(3):145-147. PubMed ID: 15930905.
    Abstract:
    We report a patient with partial tetrasomy 9q resulting from a de novo triplication of 9q13q22.1. The clinical features, including microcephaly, beaked nose, short palpebral fissures, camptodactyly, joint contractures, and moderate developmental delay were similar to trisomy 9q, although our patient also had unique features including cleft palate and several unexplained fractures. The latter could be secondary to abnormal tone and contractures. Although tetrasomy 9p is a well-known entity, our patient, to our knowledge, is the first and only individual reported to have tetrasomy 9q.
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