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THE DUCTUS BUMP

A TRANSIENT PHYSIOLOGIC MASS iN CHEST ROENTGENOGRAMS OF NEWBORN INFANTS

WALTER E. BERDON M.D.1, DAVID H. BAKER M.D.1, and L. STANLEY JAMES M.D.1

1 From the Departments of Radiology and Pediatrics, College of Physicians and Surgeons, Columbia University, The Babies Hospital, Columbia Presbyterian Medical Center, New York, New York

The ductus arteriosus may appear as a left mediastinal mass, the "ductus bump," on chest roentgenograms of the newborn infant. "Airblock" (pneumomediastinum) accentuates the findings. The current knowledge of the first day of life hemodynamic adjustments is reviewed, including catheterization and cine-angiographic studies. These lead to the conclusion that the ductus bump is a "normal" mass, transient and physiologic, presenting on chest roentgenogram of infants in the first day of life.


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