He was at his time one of the most distinguished Polish and worldwide known surgeons. In 1880, as the first in Poland and second in the world he succeeded in surgical removal of the pylorus in a patient suffering from stomach cancer. He was also the first to document this procedure. In 1881, as the first in the world, he carried out a peptic ulcer resection. In 1884 he introduced a new method of surgical peptic ulcer treatment using Gastroenterostomy. Rydygier proposed (1900) original concepts for removing prostatic adenoma and introduced many other surgical techniques.