normal permanent skin creases. Incisions parallel to Langer’s lines heal well and are less visible. [C. R. von E. Langer (1819–87), Austrian anatomist]
transverse depressions on the nails appearing some weeks or months after a severe illness or chemotherapy. [J. H. S. Beau (1806–65), French physician]... beau’s lines
fine horizontal lines seen in the angle between the diaphragm and the chest wall on a chest X-ray. It is a sign of pulmonary *oedema and therefore heart failure. [P. J. Kerley (20th century), British radiologist]... kerley b lines
Health Encyclopedia