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Correlation of progressive collapsing foot deformity with varus knee alignment in young adults - A case control study
Aanchal Bhatia1, Shiv Manik Ajoy1, Dev Anand Galagali1
1Ramaiah Medical College and Hospitals, MSR Nagar, Matthikere, Bengaluru, 560054, Karnataka, India.
Background:
Majority of patients with Progressive Collapsing Foot Deformity(PCFD) have symptoms pertaining to the knee. Malalignment at the foot will have effects on the alignment of the knee. In this case control study, we compare the alignment of the knees between patients with PCFD and controls.
Materials:
Sixty subjects, 30 PCFD and 30 controls, underwent radiographs in which the tibiofemoral angle and radiological parameters of PCFD were assessed. Parameters of PCFD were correlated with the tibiofemoral angle.
Results:
Mean tibiofemoral angle was 3.8° among the cases and 4.8° among the controls which was statistically significant(P = 0.001). Varus knee alignment was seen in 41 out of 60 limbs with PCFD which was statistically significant(P < 0.001). The tibiofemoral angle correlated significantly with the Meary angle(P = 0.03) and the talonavicular coverage angle(P = 0.003).
Conclusions:
PCFD is associated with varus knee malalignment. This varus deformity early in adulthood may lead to deleterious effects like medial compartment osteoarthritis in later life. Early intervention for such patients may help avoid this knee damage.
Level Of Evidence:
Level 3-prognostic.
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