This report describes a female infant with a rare chromosome defect, del. 12 (q22-24.1), who has severe pulmonary valve stenosis, an atrial septal defect, and a small muscular ventricular septal defect. At 4 months of age a balloon pulmonary valvuloplasty was performed in the cardiac catheterization laboratory. During the procedure, a large aberrant artery from the aorta to a sequestration of the right lower lobe of lung was found. The flow-off from the sequestration was into a dilated left atrium. The single artery supplying the sequestration was successfully occluded using an Amplatzer Duct Occluder device. There were no complications and the infant remains well at 1-year follow-up.
Morphological changes in the skin of animals were studied after application of concentrated hydrofluoric and hexafluorosilicic acid. The intact skin was not generally affected by these acids. Areas injured before application of the acid showed, however, a continuous spreading of necrosis in the deeper regions. The first histological changes were noticed 1 h after the application. Such early histological findings could be seen long before any macroscopic reaction. The main characteristic findings were the hypocellular necrosis and edema reaching as far as the subcutis. The necrosis showed sharp leukocyte demarcations.
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