Spring ligament complex: Illustrated normal anatomy and spectrum of pathologies on 3T MR imaging

- The Spring ligament complex is an important stabilizer of medial arch of foot.
- Of all SLC components, the integrity of Supero-Medial band is the most important.
- Associated pathologies with SLC instability include PTT injury, pes planovalgus and sinus tarsi syndrome.
- Conservative and operative management are viable depending on pes planovalgus progression.

The spring (plantar calcaneonavicular) ligament complex connects the calcaneus and navicular bone of the foot and serves as the primary static stabilizer of the medial longitudinal arch of the foot. In this article, we describe the normal anatomy of the spring ligament complex, illustrate 3T magnetic resonance imaging appearances in its normal and abnormal states, and discuss the pathological associations with relevant case examples.