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. 2019 Feb 28;19:29. doi: 10.1186/s12893-019-0491-y

Fig. 6.

Fig. 6

A-B. Method used to measure the area of the subchondral bone affected by the giant cell tumor of the bone: (A) The width of epicondyle to middle of joint (A) and the width of affected subchondral area (a) were measured in the anteroposterior plane; (B) The whole width of joint (B) and the width of affected subchondral area (b) were measured in the lateral plane; (a × b/A × B) × 100 =% of the subchondral bone area affected by tumor