Abstract
Several anatomical variants have been described in the knee. These variants may involve
intra- and extra-articular structures, such as menisci, ligaments, plicae, bony structures,
muscles, and tendons. They have a variable prevalence, are generally asymptomatic,
and are usually discovered incidentally in knee magnetic resonance imaging examinations.
A thorough knowledge of these findings is essential to avoid overestimating and overinvestigating
normal findings. This article reviews most anatomical variants around the knee, describing
how to avoid misinterpretation.
Keywords
normal variant - meniscus - ligament - knee - magnetic resonance imaging
