An infant is noted to have asymmetrical thigh folds and limited abduction of the hip. Further assessment reveals a "clunk" upon manipulation of legs. The nurse recognizes these as most likely signs of:

A. Developmental dysplasia of the hip (DDH): Asymmetrical thigh folds, limited hip abduction, and a palpable “clunk” during hip manipulation are classic findings associated with DDH. The “clunk” represents dislocation or reduction of the femoral head in the acetabulum, often identified through Ortolani or Barlow maneuvers during assessment. B. Normal variant that resolves by 1 year without follow-up: While some minor asymmetries may be benign, the presence of a “clunk” and restricted abduction are not considered normal findings. These signs indicate structural instability of the hip joint and require prompt evaluation to prevent long-term complications. C. Transient muscle strain: Muscle strain would typically present with pain or reduced movement but would not cause a palpable “clunk” or structural instability of the hip joint. Additionally, infants rarely sustain muscle strains without a clear history of trauma. D. Lower extremity fracture: A fracture would present with acute pain, swelling, decreased movement, and possible deformity. The findings described, particularly the “clunk” with manipulation, are more indicative of joint instability rather than a bone injury.