Figure 1. Radiographic features in an MPS IV A male patient.
a) Central beaking of the first lumbar vertebrae and posterior vertebral scalloping. b) Severe acetabular dysplasia, coxa plana, broad neck of femur. c) Flattened ribs, hepatosplenomegaly. d) Genu valgus with proximal and lateral tibial dysplasia, widening of the physeal line.
MPS: mucopolysaccharidosis