Anthony Bassler (1874-1959) was an American gastroenterologist. In 1913 he described Bassler sign: compressing the appendix to assist in diagnosing chronic appendicitis.
Aaron sign: referred pain felt in the epigastrium upon continuous firm pressure over McBurney's point, indicative of chronic appendicitis (1913) by Charles Dettie Aaron (1866-1951)
Area of skin hyperaesthesia bounded by lines joining anterior superior iliac spine, the pubic symphysis and umbilicus. One of myriad eponymous signs of acute appendicitis.