Clinical Study
Treatment of Chronic Patellar Tendinopathy with Autologous Bone Marrow Stem Cells: A 5-Year-Followup
Table 1
Sonographic grading of the patellar tendinopathy. Grade ratio between injured area and whole tendon section at US scan.
| Grade | |
| 1 | Injured area is less than 20% of the whole tendon section | 2 | Injured area is between 20% and 50% of the whole tendon section | 3 | Injured area is more than 50% of the whole tendon section | 4 | Subtotal or total tear, respectively, with partial and total tendon retraction |
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