Abstract：
The foot resembles a tripod. The 3 legs consist of (1) the tip of the heel, (2) the first metatarsal, and (3) the fifth metatarsal. This concept is useful to explain cavus or flat feet. When the tips of the tripod move closer, the arch becomes higher. The leg of the tripod that moves the most will determine the type of cavus feet, which can be hindfoot cavus, forefoot cavus, or first metatarsal cavus. Cavovarus foot denotes the presence of a three-dimensional deformity of the foot, but it is much more a descriptive feature than a diagnosis.
摘要：
脚就像三脚架。3条腿由（1）脚跟的尖端组成，（2）第一跖骨，（3）第五跖骨。这个概念对于解释cavus或扁平足很有用。当三脚架的尖端靠近时，拱门变得更高。移动最多的三脚架的腿将决定洞穴脚的类型，可以是后脚洞穴，前脚洞穴,或者第一跖骨腔.Cavovarus脚表示脚的三维畸形的存在，但它更多的是描述性特征而不是诊断。
