Magnetic Targeted Delivery of Induced Pluripotent Stem Cells Promotes Articular Cartilage Repair

Figure 4

Tumor formation in the knee joints and subcutaneous spaces in the NM group at 4 weeks after transplantation. Macroscopically, the tumor was solid and cystic (a). Histopathological findings of the tumor (hematoxylin and eosin stain, b and c). The tumor contains immature neuroepithelium (), immature cartilage (), and immature mesenchymal elements (). We conclude that the tumor is immature teratoma. Scale bar = 2 mm in (b) and 500 μm in (c).

(a)

(b)

(c)