Continuing our long-lasting tradition, would like to invite you to Scientific Committee of the 21st Congress of Polish Osteoarthrology Society, with 9th CE Congress on Osteoporosis and Osteoarthritis, that will take place online from September 27th till 29th 2023. Your participation in the Committee will be a great honour and invaluable help in creating the scientific program.The leading topics of the Congress will be primary and secondary osteoporosis, bone cancer, sarcopenia and osteoarthritis. The program of lectures will cover topics such as: advances in the diagnosis of osteoporosis and fracture risk assessment, vit. D in clinical trials, the effectiveness of antiresorptive therapy, the place of anabolic drugs in the treatment of osteoporosis, problems of long-term treatment, management after discontinuation of denosumab, prevention of cancer metastases, fractures in diabetes, sarcopenia and falls, analgesic therapy and others. We plan around 44 lectures both in Polish and English language. Lectures will be presented by eminent invited speakers from Poland and abroad. We anticipate the participation of 1.200 doctors from Poland and abroad. Our congress will be organized on the basis of Polish Osteoporosis Portal, where you can read about the history of our congresses since 1994, link: https://osteoporoza.pl/for-doctors/archiwum-kongresow/. Current information of Congres 2023 are available on www.kongres2023.osteoporoza.pl.