FAMILIAL BILATERAL RECURRENT DISLOCATION OF THE PATELLA WITH SEVERE TROCHLEA DYSPLASIA

Purpose of the study We report four cases of bilateral recurrent dislo cation of the patella with major trochlear dysplasia, in the same fami ly. Material and Methods Details of clinical examination of all member s of this family and measurements on knee radiographs are reported. Re sults In all cases a severe proximal dysplasia of the trochlea was des cribed on lateral views. The patella and the trochlea had a normal sha pe on the axial view. Discussion In some recurrent dislocation, with n o associated disease, possibility of a genetic transmission have been suggested in some publications. Cases involving the same family have n ever been reported to confirm a genetic transmission of a bilateral an d major trochlear dysplasia, Conclusion This report points out a genet ic origin of severe trochlear dysplasia, To know more about transmissi on and chromosomic localisation, careful investigations on others fami lies of bilateral dislocations with trochlear dysplasia must be done.