Meniscal cysts are not uncommon in clinical practice, with reported incidence rates varying from 1 to 22%. Most meniscal cysts are parameniscal cysts, which are created by extravasation of synovial fluid through the meniscal tear into the adjacent soft tissue. In contrast, intrameniscal cysts in which the fluid collects in the meniscus are very rare. We encountered a teenager with a huge intrameniscal cyst accompanied by a small vertical meniscal tear in the red-white zone of the upper surface of the medial meniscus. A literature search revealed no information regarding the appropriate treatment methods and results for this type of lesion. A 14-year-old boy presented to our outpatient clinic because of right knee pain that had been present for the previous 2 months. The patient participated in Hapkido, but had no specific trauma history. Magnetic resonance imaging revealed a huge intrameniscal cyst located in the central parenchyma of the posteromedial corner of the medial meniscus. In addition, one sagittal slice on MRI revealed a vertical tear in the red-white zone of the upper surface of the medial meniscus. The presence of such a tear accompanied by a huge intrameniscal cyst is very unusual. The patient was treated via arthroscopic inside-out meniscal suture repair and open cystic debridement with additional meniscocapsular suturing. During 4 years of magnetic resonance imaging follow-up, the lesion has completely disappeared and the meniscus has successfully recovered its normal form. Our treatment method may be considered as the first choice for young patients who require surgical treatment for large intrameniscal cysts with accompanying small vertical meniscal tears.

中文翻译：

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开放清创结合关节镜和开放修复成功治疗巨大的半月板内囊肿：一例报告

半月板囊肿在临床实践中并不罕见，据报道发病率在1％至22％之间。大多数半月板囊肿是半月板囊肿，由滑液通过半月板撕裂渗入相邻的软组织而形成。相反，液体聚集在半月板中的半月板内囊肿非常罕见。我们遇到了一个少年，该少年的半月板内囊肿巨大，在半月板内侧上表面的红白色区域伴有小的垂直半月板撕裂。文献检索显示，没有有关此类病变的适当治疗方法和结果的信息。一个14岁的男孩因前两个月出现的右膝盖疼痛而出现在我们的门诊。该患者参加了Hapkido，但没有特定的创伤史。磁共振成像显示巨大的半月板内囊肿位于内侧半月板后内侧角中央薄壁组织中。此外，MRI上的一个矢状切面显示在内侧半月板上表面的红白色区域中出现了垂直撕裂。这种眼泪伴有巨大的半月板内囊肿的存在非常罕见。该患者通过关节镜内外半月板缝合修复和开放性囊性清创术以及其他半囊膜缝合术进行治疗。在磁共振成像的四年随访中，病变已完全消失，半月板已成功恢复其正常形态。对于需要对大的半月板内囊肿伴有小的垂直半月板撕裂进行手术治疗的年轻患者，我们的治疗方法可能被视为首选。