L-shaped great toe malformation in children

Contrary to the more typical deformity hallux valgus, hallux valgus interphalangeus (HVI) has not garnered much attention in the literature on the foot and ankle. In hallux valgus interphalangeus, the distal phalanx is internally rotated in reference to the proximal phalanx. The abnormality typically manifests in the early years of life and can advance quickly during growth spurts.

Obliquity of the articular surface of the proximal phalangeal head and an asymmetrical distal phalanx are two potential causes of HVI. The deformity consists of a deviation of the articular surfaces of the interphalangeal joint. A further contributing element has been identified as lateralization of the extensor hallucis longus (EHL) tendon insertion. The proximal phalanx can be operated on, or the interphalangeal joint can be fused. Arthrodesis of the interphalangeal joint offers a greater level of repair with more dependable long-term results than moderate cases of the deformity can be addressed with osteotomy following skeletal maturity.

A complicated deformity affecting both the articulation and the surrounding soft tissue is hallux valgus interphalangeus. Early surgical surgery is advised because the deformity can advance rather quickly. Arthrodesis of the interphalangeal joint is advised to offer dependable and long-lasting repair because the deformity is typically inflexible and severe.


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