Pes Calcaneus Leading to Genu Recurvatum: A Distal-to-Proximal Deformity Cascade Treated by Rotating Hinge Arthroplasty: Two Case Reports
Year: 2026
Type: article
Abstract: Introduction: Chronic pes calcaneus deformity alters sagittal-plane limb mechanics by anteriorly displacing the ground reaction force and may induce a persistent knee hyperextension moment. A possible distal-to-proximal deformity cascade that progressed to severe genu recurvatum and secondary knee osteoarthritis needing hinged total knee arthroplasty is complex and rarely described. Case Report: The first patient is a 53-year-old woman presenting with a 25° recurvatum, while the second patient is a 73-year-old woman presenting with a 30° genu recurvatum secondary to untreated pes calcaneus. Both patients developed painful osteoarthrosis necessitating a rotating hinge knee arthroplasty. At 5 and 4 years of follow-up, respectively, they reported no pain or recurrence of deformity, and radiographic evaluation showed stable prostheses without evidence of loosening. Conclusion: We describe a possible distal-to-proximal deformity cascade associated with progressive genu recurvatum and secondary knee osteoarthritis requiring hinged knee arthroplasty. Rotating hinge arthroplasty has been used successfully in our study; however, further investigation is necessary to establish its long-term outcomes.
Institution: Fortis Hospital
Language: English
Subfield: Surgery
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $250
OpenAlex ID: W7225558361
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