The deformity, congenital metatarsus adductus, has been given different names in various countries by different authors. In addition, there are both mild and severe forms, and some authors subdivide the deformity by degree. The severe form is also called skewfoot or serpentine foot, but to us these terms only appear to represent differences in degree. With regard to etiology, it has been found that a narrow uterus, for various reasons, seems to play a role, and that the foot and lower leg is rotated internally. If not treated early, the internal rotation of the lower leg increases and is frequently misdiagnosed. Conservative treatment consists, first of all, of plaster casts, with the lower leg rotated externally, the forefoot abducted, and the hindfoot supinated. The deformity itself consists of the adducted metatarsal bones and--to different degrees--a subluxation of the Chopart joint. In extreme cases there is a vertical medially directed talus and the navicular bone is displaced laterally. Different surgical procedures are discussed. We have found that the tendon of the anterior tibial muscle inserts more distally than usual at the base of the first metatarsal bone and winds itself towards the plantar side. For treatment, it is transferred to the dorsal side of the first cuneiform bone. In one child with severe serpentine feet, the posterior tibial muscle did not insert at the navicular bone but only inserted at the plantar side of the middle part of the foot. During the operation, the Chopart joint is reduced and a part of the posterior tibial tendon is led to the navicular bone.
先天性内收足畸形在不同国家被不同作者赋予了不同的名称。此外，该畸形有轻度和重度之分，一些作者还根据程度对其进行细分。重度畸形也被称为畸形足或弓形足，但在我们看来，这些术语似乎仅代表程度上的差异。关于病因，已发现由于各种原因，狭窄的子宫似乎起了作用，且足部和小腿会向内旋转。若不及早治疗，小腿的内旋会加重，且常被误诊。保守治疗首先是使用石膏固定，小腿向外旋转，前足外展，后足旋后。畸形本身包括内收的跖骨以及不同程度的距舟关节半脱位。在极端情况下，距骨垂直向内，舟骨向外侧移位。文中讨论了不同的手术方法。我们发现胫骨前肌肌腱在第一跖骨基部的附着点比正常情况更靠远端，且向足底侧缠绕。治疗时，将其转移至第一楔骨的背侧。在一名患有重度弓形足的儿童中，胫后肌未附着于舟骨，而是仅附着于足部中部的足底侧。手术过程中，需整复距舟关节，并将部分胫后肌腱引至舟骨。
