ArticleZhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery2026
[Correlation between fourth brachymetatarsia and hallux valgus].
Article in Zhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Objective: To investigate the correlation between fourth brachymetatarsia and hallux valgus, and to provide evidence-based support for clinical decision-making. Methods: A retrospective analysis was conducted on 68 patients (89 feet) with congenital fourth brachymetatarsia treated between August 2021 and November 2025. All patients were female, aged 18-44 years (mean, 28.1 years). The hallux valgus angle (HVA), intermetatarsal angle (IMA), and shortening length of the fourth metatarsal were measured on standardized weight-bearing anteroposterior foot X-ray films. Hallux valgus-related complications were recorded. The prevalence of hallux valgus was compared with the reference value reported for the general adult female population in China (14.74%). Spearman rank correlation analysis was used to evaluate the correlations of HVA and IMA with age and metatarsal shortening length. Results: In the entire cohort, HVA ranged from 5.65° to 44.95° (mean, 20.56°), IMA ranged from 6.46° to 20.45° (mean, 11.61°), and the shortening length of the fourth metatarsal ranged from 5.62 to 18.01 mm (mean, 12.05 mm). Hallux valgus was present in 55 feet, giving a prevalence of 61.80%, which was significantly higher than the reference value for the general adult female population in China ( Conclusion: Patients with fourth brachymetatarsia have a significantly higher prevalence of hallux valgus, which is positively correlated with the degree of metatarsal shortening but not with age, suggesting an anatomical rather than age-related etiology. The study redefines the clinical nature of fourth brachymetatarsia, promoting a paradigm shift from "cosmetic correction" to "functional reconstruction". It is recommended that this deformity be included as a screening indicator for populations at high risk of hallux valgus.
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