Medial malleolus is a term used to describe the bony prominence on the inner side of the ankle joint. It is part of the tibia bone, which is one of the two bones in the lower leg. There are several synonyms that can be used to describe the medial malleolus. Another common term is the tibial malleolus, which is derived from the name of the bone where it is located. The medial ankle bone, inner ankle bone, and inner ankle bump are also frequently used to describe this structure. Regardless of the terminology used, the medial malleolus is an important part of the ankle joint and plays a crucial role in maintaining overall foot and ankle stability.