What is a classical presentation of arthrogryposis often described as "Frog Leg"?

The classical presentation of arthrogryposis described as "Frog Leg" is characterized by extended arms and flexed legs. This specific posture reflects the limitations in joint mobility typically observed in individuals with arthrogryposis multiplex congenita (AMC).

In this condition, contractures occur in the limbs, and the "Frog Leg" position illustrates how the hips are often externally rotated and abducted, while the knees are flexed. The extension of the arms and proximity to the body mimics the posture of a frog, hence the name. This unique alignment can significantly affect mobility and the range of motion, making it a distinctive clinical feature when diagnosing or evaluating a patient with this syndrome.