Medial malleolus

Malleolus
Coronal cross-section through the right ankle showing the lateral malleolus (right) and medial malleolus (left)
The left leg, with the medial malleolus labeled at bottom right.
Details
Identifiers
Latin	malleolus, malleoli
Dorlands /Elsevier	m_02/12511187
TA	A02.5.06.020 A02.5.07.014
Anatomical terms of bone []

A malleolus is the bony prominence on each side of the human ankle.

Each leg is supported by two bones, the tibia on the inner side (medial) of the leg and the fibula on the outer side (lateral) of the leg. The medial malleolus is the prominence on the inner side of the ankle, formed by the lower end of the tibia. The lateral malleolus is the prominence on the outer side of ankle, formed by the lower end of the fibula.

The word malleolus (/məˈliːələs, mæ-/), plural malleoli (/məˈliːəˌlaɪ, mæ-/), comes from Latin and means "small hammer". (It is cognate with mallet.)

The medial malleolus is found at the foot end of the tibia. The medial surface of the lower extremity of tibia is prolonged downward to form a strong pyramidal process, flattened from without inward - the medial malleolus.

Structures that pass behind medial malleolus deep to the flexor retinaculum: