RÉSUMÉ
Congenital pseudarthrosis of the clavicle is a rare entity, a little more than one hundred cases have been reported in the English literature [1, 2, 3]. This article describe a 7 year-old boy presented with a painless lump in the right clavicular region. Clinical, radiological and histological studies proved to be congenital pseudarthrosis of the clavicle. A well- developed right cervical rib was observed. The case was treated by excision of the pseudarthrosis, a free fibular graft and fixation with a controured 1/3 tubular. AO plate. Solid union was achieved at 5 months postoperatively. Histological examination of the excised ends of the pseudarthrosis showed enchondral ossWcation which supports the hyposthesis that the pseudarthrosis resultsfromfailedfusion of two ossification centers. The final result was satisfactory from the functional and cosmetic points of view after five years of follow-up and there were no signs of complications