RESUMEN
To evaluate the therapeutic effect of intramuscular injection of Botox A on children with mild to moderate shortening of tendoachillis. Forty children were involved in this study, the age ranged from 1 and 2/12 year and 2 and 7/12 years with mean age I and 7/12 +/- 4/12 years. Patients were divided into two equal groups. Patients of the first group had mild tightness, and subdivided into 2 groups A and B, each included JO cases. Group A was treated by Botox injection, while group B received other physical modalities without Botox injection. The second group had moderate tightness and subdivided into two groups [C and D], each included 10 cases. Group C received two Botox injections [once every 3 months] while group D received other physical modalities. Each group was monthly evaluated up to 6 months, by modified Ashworth scale, patients' global response Btx A treatment, ankle ROM, pain score, and walking time. Results: There was high percentage of improvement in groups A and C in pain score, kinetic score, tenderness, and walking score. The percentage of improvement was less in group B and D. Botox A intramuscular injection in the calf muscles of children with mild to moderate tightness tendoachillis had good effects to decreasing pain. tenderness and muscle tone