Case Report
Copyright ©The Author(s) 2022.
World J Clin Cases. Dec 6, 2022; 10(34): 12665-12670
Published online Dec 6, 2022. doi: 10.12998/wjcc.v10.i34.12665
Figure 2
Figure 2 Surgical procedures of the patellar defect. A: Exposed large subchondral bone on the medial patellar facet; B: After multiple drillings on the subchondral bone; C: After implantation of the human umbilical cord, blood-derived mesenchymal stem cells into the defect.