The radiography is the mainstay of diagnosis in late DDH, CT and MRI has increasing roles in assessing and treating late DDH and its complications. Imaging in the older child or young adult with DDH helps define the underlying patho-anatomy as well plan appropriate treatment. The treatment of the asymptomatic adolescent or young adult with DDH remains controversial. MR imaging has become invaluable in assessing labral abnormalities. In the absence of underlying osseous abnormalities, most surgeons believe isolated labral tears are best treated with arthroscopic techniques. However, when patients with labral tears also have underlying osseous deformities that create impingement some surgeons believe these deformities require additional surgery.