usually segmental underdevelopment of the ureter causing stenosis and hydronephrosis. ureteral obstruction. may be caused by intraluminal lesions, e.g. urolithiasis, or as part of pyelonephritis or by external compression of the ureter or as a congenital defect. Sudden blockage causes acute abdominal pain that lasts for several hours.
Chuseok (ì¶ì; ç§å¤; [tÉÊ°u.sÊkÌ]), originally known as hangawi (íê°ì; [han.É¡a.É¥i]; from archaic Korean for the great middle (of autumn)), is a major harvest festival and a three-day holiday in Korea celebrated on the 15th day of the 8th month of the lunar calendar on the full moon.
Woodson decided to celebrate the week in February because that month included the birthdays of President Abraham Lincoln, who signed the Emancipation Proclamation, and Frederick Douglass, the famed black abolitionist. In 1976, the U.S. government expanded the weeklong celebration to Black History Month. More Â».