M. HANADA ET AL. 429
Table 6. The comparison of frequency of types of medial
synovial plica betwe en the study by Sakakibara’s classifica -
tion and ours.
Classification
(Sakakibara/Ours)
Sakakibara
(N = 100 knees)
Ours
(N = 130 knees)
Absent 55 (55.0%) 49 (37.7%)
A/narrow 4 (4.0%) 45 (34.6%)
B/medium 16 (16.0%) 22 (16.9%)
C/broad 23 (23.0%) 8 (6.2%)
D/perforated 2 (2.0%) 6 (4.6%)
5. Conclusion
We arthroscopically investigated and classified suprapa-
tellar plica and medial synovial plica in the Japanese
population. There was no relationship between suprapa-
tellar plica and medial synovial plica. We classified more
simply into 6 types of suprapatellar plica by only location
and shape of plica than Dandy’s classification. We clas-
sified simpler type of medial synovial plica by the size of
plica because Sakakibara’s Type A is a cord-like eleva-
tion in the synovial wall which is difficult to distinguish
with no existence of this plica.
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