Which statement below is true of infants with developmental dysplasia of the hip?

• A. They usually have other orthopedic ailments.
• B. Most have some congenital orthopedic anomaly.
• C. There is often pain in the hip when the infant's diaper is changed.
• D. A palpable clunk is considered diagnostic.

Answer: (B)

DDH in infants often occurs in the context of broader musculoskeletal development, so many babies with this condition have other congenital orthopedic anomalies. This association reflects shared factors in fetal development and positioning that can affect multiple joints. Because of this, the statement that most infants with DDH have some congenital orthopedic anomaly is the best fit.

Pain in the hip during diaper changes isn’t a typical presenting feature in infants with DDH; symptoms are usually not described as pain and the condition is detected through exam and imaging rather than by pain response. A palpable clunk from the Ortolani test can indicate a reducible hip but is not considered definitive for all cases of DDH, since hip dysplasia can be present without a clunk and other factors can affect test reliability.