Deformity is a condition where the extremity deviates from normal anatomy. Shortness, angulation or rotations are different type of deformities. Tibia is a bone which deformities have seen frequently due to its close position to trauma. Large tibial deformities are often successfully treated with external fixators, since the bone is the easiest one to use circular external fixators. Accurate evaluation of deformity is essential for successful treatment. The CORA which is consisting of intersection between proximal and distal orientation lines is at the apparent level of deformity in uniapical deformities. The CORA is not at the level of apparent deformity in multi-apical deformities and this CORA called resolution CORA. It is essential to find the real CORAs for accurate planning. Recognition of multi-apical deformities can be difficult in some cases. It can easily be overlooked, especially in the presence of additional deformity close to the joint. If the multi-apical deformity is treated as a uni-apical deformity, joint orientation may be disrupted or cosmetic problems may occur.