Children who toe-walk can pose a diagnostic problem. The differential
diagnosis includes mild spastic diplegia and idiopathic toe-walking. C
linical differentiation between these two patient groups can be partic
ularly difficult, and there are no objective diagnostic tests to assis
t the clinician. We assessed 50 children who toe-walk to define the ki
nematic patterns of lower-limb joint motion in the sagittal plane. The
re were 23 children with mild spastic diplegia, 22 idiopathic toe-walk
ers, and five normal children who were asked to toe-walk. We found cha
racteristic patterns of knee and ankle motion that differentiated spas
tic diplegia from idiopathic toe-walking. Normal children asked to toe
-walk had the same pattern as the idiopathic group. Gait analysis is a
diagnostic tool that enables the clinician objectively to differentia
te mild spastic diplegia from idiopathic toe-walking.