Radiological outcome
bone edema, edema
EDEMA, REMISSION
Preoperatively, all MRIs showed a hyperintense, bulky ACL, which occupied the intercondylar notch with an increased T2 signal and a mass-like configuration with “celery stalk” sign (Fig. MRI of MDACL before and after treatment of partial resectionOn initial MRI scans, mean thickness of ACL was 15.7 ± 2.4 mm (range 11–19 mm) in all patients. On average, ACLs in Group I were measured slightly thinner than in Group II (Group I: 14.6 ± 2.4 mm (range 11–19 mm) vs. Group II: 16.7 ± 1.9 mm (range 14–19 mm), Postoperatively, Group I showed a mean ACL thickness of 11.4 ± 3.6 mm (range 4–15 mm). Pairwise comparison of thickness values prior to and post-surgery in Group I did not show significant differences.Mean ACL/intercondylar ratio was 0.61 ± 0.08 (range 0.50–0.71) in all patients. Subgroup analysis revealed a slightly greater ACL/intercondylar ratio in Group I than in Group II in preoperative MRI scans (Group I: 0.65 ± 0.06 (range 0.53–0.71) vs. Group II: 0.57 ± 0.08 (range 0.50–0.71); p = 0.02). After partial resection procedure, mean ACL/intercondylar ratio was 0.58 ± 0.22 (range 0.22–0.93) on follow-up MRI scans in Group I. Again, pairwise comparison of ACL/intercondylar values prior to and post-surgery in Group I did not show significant differences (Table 100% had a distal femur or tibia edema preoperative. 50% of Group I and 60% of Group II showed intraosseous cysts. Postoperative 95% of all patients showed a complete remission of the bone edema and no cysts. Only one patient (Group I) showed a slight and asymptomatic edema in the tibia.