Sesamoid Bone of Left Foot (Lateral/Fibular) (Os sesamoideum laterale pedis sinister)
Educational content only — not medical advice.
Anatomy
The lateral (fibular) sesamoid bone of the left foot is embedded in the lateral tendon of the flexor hallucis brevis beneath the lateral facet of the first metatarsal head. It functions alongside the medial sesamoid to bear weight and stabilize the first metatarsophalangeal joint.
Clinical notes
Avascular necrosis of the lateral sesamoid (Renander disease) causes chronic forefoot pain and localized swelling aggravated by hallux dorsiflexion.
Related structures
Educational references
FAQ
What is the role of the Sesamoid Bone of Left Foot (Lateral/Fibular)?
The lateral (fibular) sesamoid bone of the left foot is embedded in the lateral tendon of the flexor hallucis brevis beneath the lateral facet of the first metatarsal head. It functions alongside the medial sesamoid to bear weight and stabilize the first metatarsophalangeal joint.
Why is the Sesamoid Bone of Left Foot (Lateral/Fibular) clinically important?
Avascular necrosis of the lateral sesamoid (Renander disease) causes chronic forefoot pain and localized swelling aggravated by hallux dorsiflexion.
Source & license
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