How to Read a Pediatric Hand X-Ray for Bone Age

Bone age assessment relies on the visual evaluation of skeletal development in the hand and wrist. In this guide we walk through a practical, stepwise approach used in busy clinics.

Why the left hand?

By convention, a PA radiograph of the left hand and wrist is used for comparison against standardized atlases such as Greulich and Pyle.

Key ossification centers

Evaluate the epiphyses of the distal radius and ulna, the carpal bones, and the phalanges. The complexity of 21 tubular bones and 8 carpal bones is exactly why digital reference tools help.

Common pitfalls

Avoid anchoring on a single bone; skeletal maturation is a spectrum and gender-specific standards matter.