A Case of Type I Sirenomelia Complicated by Severe Oligohydramnios in the First Trimester

Figure 7

Classification of sirenomelia by Stocker and Heifetz [2]. Type I: all bones of thigh and lower leg present; type II: fused fibula; type III: fibula absent; type IV: partially fused femur, fused fibula; type V: partially fused femur, fibula absent; type VI: fused femur, fused tibia; type VII: fused femur, tibia absent.