PhD MD Szymon Pietrzak is a specialist in the field of orthopedics and hearing organ traumatology. He graduated from the Medical Faculty of Poznań University of Medical Sciences. He has over 20 years’ work experience in the field of child orthopedics. His main field of interest is congenital, developmental and inherited lower limb deformations, limb deformations as a result of cerebral palsy, hernia, arthogryposis, as well as lengthening and correction of limb axes. He is a member of the Child Orthopedics Section of PTOiTr, EPOS and ASAMI Poland.