Quantitative roentgen-and-anatomic characteristics of muscles in patients of different age with achondroplasia before and after lower limb lengthening according by CR, CT, MRT data

The condition of muscles in 84 patients with achondroplasia has been studied by the techniques of radiological diagnostics (CT, MRT, CR) at different stages of lower limb lengthening. The results of the work demonstrated that adaptative-compensatory and restorative processes in femoral and leg muscles ended with formation of new muscle-tendon relations, approximating by their parameters to proper age standards. The complex assessment of the condition of lower limb muscles in patients with achondroplasia before proceeding to just another stage of lengthening should include determination of the muscle belly index (MBI), contractility coefficient (C1) and muscular tissue density