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J Am Coll Cardiol, 1997; 30:1067-1071
© 1997 by the American College of Cardiology Foundation
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Truncus arteriosus communis associated with chromosome 22q11 deletion

K Momma, M Ando, and R Matsuoka

Department of Pediatric Cardiology, Heart Institute of Japan, Tokyo Women's Medical College, Japan. prmomma@nora.hij.twmc.ac.jp

OBJECTIVES: The purpose of this study was to clarify characteristics of truncus arteriosus communis associated with chromosome 22q11 deletion (del 22q11). BACKGROUND: DiGeorge syndrome and conotruncal anomaly face syndrome are associated with del 22q11 (hemizygosity). In 30% of cases, truncus arteriosus communis is associated with the deletion. METHODS: Fifteen consecutive patients with truncus arteriosus communis were checked for 22q11 with fluorescent in situ hybridization using an N25 probe (Oncor). Cardiovascular anomalies were studied with cardiac catheterization, cineangiography and echocardiography. RESULTS: Five patients had del 22q11. Two had a rare type of truncus arteriosus: type A3 of Van Praagh and Van Praagh with major aortopulmonary collateral arteries and pulmonary ostial stenosis. The other three had type A1 truncus arteriosus and pulmonary artery stenosis. One of them had major aortopulmonary collateral arteries. Ten patients with truncus arteriosus had no del 22q11. The types of truncus arteriosus in these 10 patients were type A1 in 7, type A2 in 2 and type A3 with closed ductus in 1. None of nine patients with type 1 or type 2 truncus arteriosus had pulmonary stenosis. CONCLUSIONS: In truncus arteriosus communis, the rare type A3 with major aortopulmonary collateral arteries and pulmonary ostial stenosis and type A1 with pulmonary artery stenosis are associated with del 22q11.


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Copyright © 1997 by the American College of Cardiology Foundation.