Anomalous insertion of the anterior horn of the medial meniscus combined with anterior horn hypertrophy and a synovial cyst: case report and literature review. Issue 2 (February 2021)

• Record Type: Journal Article
• Authors: Chen, Peng; Huang, Pengzhou; Ren, Yuxiang; Jiang, Guanwei; Zhang, Wentao; Zhang, Xintao
• Is Part Of: Journal of international medical research. Volume 49:Issue 2(2021)
• Publication Date: 2021-02
• Subjects: Anomalous insertion -- medial meniscus -- synovial cyst -- hypertrophy of anterior horn -- malformation -- case report -- literature review; Medicine -- Periodicals; Pharmacology -- Periodicals; 610.5
• DOI: 10.1177/0300060520981538
• Languages: English
• ISSNs: 0300-0605

Abstract

Objective: To gain a greater understanding of anomalous insertions of the anterior horn of the medial meniscus through evaluation of a rare case and a review of the existing literature on medial meniscus malformations. Methods: This report describes a 26-year-old man with an anomalous insertion of the anterior horn of the medial meniscus combined with symptomatic hypertrophy of the anterior horn and a synovial cyst. We also conducted a review of the existing literature on medial meniscus malformations using five major scholarly literature databases and search engines. Results: The literature review revealed that the incidence of anomalous insertions of the anterior horn of the medial meniscus is 0.5% to 2.8%. Not all patients undergo surgical excision; some are only symptomatically treated. In our patient, the arthroscopic view was consistent with the imaging characteristics. No special operation was performed to treat the anomalous insertion. At the 18-month follow-up, the patient had no symptom recurrence and had returned to practicing sports. Conclusion: The pain during hyperextension in our patient was caused by a cyst and anterior horn hypertrophy. If the symptoms in such cases are not caused by the anomalous insertion, no special treatment is needed.