Phob GanokrojPisit LertwanichChandhanarat ChandhanayingyongEkavit KeyurapanBavornrat VanadurongwanFaculty of Medicine, Siriraj Hospital, Mahidol University2020-08-252020-08-252020-04-01JBJS case connector. Vol.10, No.2 (2020), e0127216032512-s2.0-85088200773https://repository.li.mahidol.ac.th/handle/20.500.14594/58200CASE: We report a 39-year-old man who presented with a painful mass that had been growing over the anteromedial aspect of his left leg for 2 years and was recurrent after an open excisional biopsy. Magnetic resonance imaging showed a lobulated cyst that extended from the medial meniscus. Arthroscopic cyst decompression, anterior cruciate ligament reconstruction, partial meniscectomy, and repair of the meniscotibial capsule were performed. There was no recurrence during the 1-year follow-up. CONCLUSIONS: Arthroscopic cyst decompression and repair of the posterior meniscotibial capsule is a good and safe alternative procedure for the treatment of large-sized meniscal cysts with distal extensions.Mahidol UniversityMedicineArticleSCOPUS10.2106/JBJS.CC.19.00127