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Formation of ring-shaped lateral meniscus following anterior cruciate ligament reconstruction: A case report

View Article: PubMed Central - PubMed

ABSTRACT

There were no meniscal anomalies such as discoid meniscus and ring-shaped meniscus at the first surgery.

Postoperative MRI showed a ring-shaped lateral meniscus.

On second-look arthroscopy, there was a meniscus-like tissue formation that connected the anterior horn to the posterior horn of the lateral meniscus at the lateral intercondylar tubercle.

The ring-shaped meniscus-like tissue was spontaneously formed after ACL reconstruction.

The ring-shaped meniscus-like tissue was spontaneously formed after ACL reconstruction.

No MeSH data available.


MR images before second-look arthroscopy.(A) A newly-developed bridging tissue (arrow).(B) The bridging fiber formed a ring-shaped lateral meniscus (arrow).
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fig0015: MR images before second-look arthroscopy.(A) A newly-developed bridging tissue (arrow).(B) The bridging fiber formed a ring-shaped lateral meniscus (arrow).

Mentions: MRI examination was performed at 1 year postoperatively. A coronal plane of MR images showed a small triangular fragment located at the medial border of the lateral tibial plateau (Fig. 3A). An axial plane demonstrated a ring-shaped lateral meniscus (Fig. 3B). The patient underwent second-look arthroscopy in conjunction with hardware removal. Informed consent was obtained from the patient to allow arthroscopic examination of the knee during hardware removal. On second-look arthroscopy, we carefully observed the reconstructed ACL and menisci using a probing technique. The surface of the reconstructed bundles was covered by synovial tissues. There was a meniscus-like tissue formation that connected the anterior horn to the posterior horn of the lateral meniscus at the lateral intercondylar tubercle (Fig. 4A, B). The anterior and posterior horns were firmly attached to their original insertions. This inter-horn bridging tissue was stable and showed no impingement finding. Therefore we did not perform resection and biopsy of the bridging tissue at second-look arthroscopy. This patient was able to return to his sports activities at 3 weeks later without any complaints.


Formation of ring-shaped lateral meniscus following anterior cruciate ligament reconstruction: A case report
MR images before second-look arthroscopy.(A) A newly-developed bridging tissue (arrow).(B) The bridging fiber formed a ring-shaped lateral meniscus (arrow).
© Copyright Policy - CC BY-NC-ND
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC5304237&req=5

fig0015: MR images before second-look arthroscopy.(A) A newly-developed bridging tissue (arrow).(B) The bridging fiber formed a ring-shaped lateral meniscus (arrow).
Mentions: MRI examination was performed at 1 year postoperatively. A coronal plane of MR images showed a small triangular fragment located at the medial border of the lateral tibial plateau (Fig. 3A). An axial plane demonstrated a ring-shaped lateral meniscus (Fig. 3B). The patient underwent second-look arthroscopy in conjunction with hardware removal. Informed consent was obtained from the patient to allow arthroscopic examination of the knee during hardware removal. On second-look arthroscopy, we carefully observed the reconstructed ACL and menisci using a probing technique. The surface of the reconstructed bundles was covered by synovial tissues. There was a meniscus-like tissue formation that connected the anterior horn to the posterior horn of the lateral meniscus at the lateral intercondylar tubercle (Fig. 4A, B). The anterior and posterior horns were firmly attached to their original insertions. This inter-horn bridging tissue was stable and showed no impingement finding. Therefore we did not perform resection and biopsy of the bridging tissue at second-look arthroscopy. This patient was able to return to his sports activities at 3 weeks later without any complaints.

View Article: PubMed Central - PubMed

ABSTRACT

There were no meniscal anomalies such as discoid meniscus and ring-shaped meniscus at the first surgery.

Postoperative MRI showed a ring-shaped lateral meniscus.

On second-look arthroscopy, there was a meniscus-like tissue formation that connected the anterior horn to the posterior horn of the lateral meniscus at the lateral intercondylar tubercle.

The ring-shaped meniscus-like tissue was spontaneously formed after ACL reconstruction.

The ring-shaped meniscus-like tissue was spontaneously formed after ACL reconstruction.

No MeSH data available.