Fig. 4
From: Comparison of arthroscopic internal drainage and open excision for the treatment of popliteal cysts
Distributions of Rauschning and Lindgren grade in the two groups at the last follow-up. Grade 0, no swelling and pain, no limitation of movement; Grade 1, slight swelling and pain following intense activity, minimal limitation of movement < 10°; Grade2, moderate swelling and pain following normal activity, 10–20° range limitation; Grade 3, considerable swelling and pain even at rest, > 20° range limitation