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Updated: Apr 25, 2026
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A Mouse Model of Ankle-Subtalar Complex Joint Instability
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Isolated Fifth Metatarsocuboid Coalition: A Case Report
Hayato Kobayashi1, Yasunori Kageyama2, Yoji Shido3
1Department of Orthopaedic Surgery, Fujieda Heisei Memorial Hospital, Shizuoka, Japan.
Summary
This study details a rare case of fifth metatarsocuboid coalition in an adult female. Surgical intervention successfully treated her symptomatic coalition, ankle osteoarthritis, and instability, improving her mobility.
Area of Science:
- Orthopedic Surgery
- Foot and Ankle Surgery
- Podiatric Medicine
Background:
- Tarsometatarsal coalitions are uncommon foot abnormalities.
- Isolated fifth metatarsocuboid coalition is exceptionally rare, with only five prior cases documented, typically involving other tarsal joints.
Observation:
- A 69-year-old female presented with a symptomatic isolated fifth metatarsocuboid coalition.
- This was associated with ipsilateral varus-type ankle osteoarthritis and instability.
Findings:
- The patient underwent a complex surgical procedure including arthrodesis of the fifth metatarsocuboid joint, osteotomies, and tendon advancement.
- Post-operative recovery at 1.5 years showed successful consolidation and improved ambulation, with minor discomfort resolved by padding.
Implications:
- This case highlights that isolated fifth metatarsocuboid coalition, though rare, can be a significant source of pain and functional limitation.
- Successful surgical management can restore function and alleviate symptoms in affected individuals.
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