M23.0 - Cystic meniscus
M23.04 - Cystic meniscus, anterior horn of lateral meniscus
M23.041 - Cystic meniscus, anterior horn of lateral meniscus, right knee
M23.042 - Cystic meniscus, anterior horn of lateral meniscus, left knee
M23.049 - Cystic meniscus, anterior horn of lateral meniscus, unspecified knee