Differential Diagnosis
- Single most likely diagnosis
- F) Poorly developed acetabulum: This is the most likely diagnosis, given the patient's presentation of a painless limp, limited abduction of the left hip, and a shorter left lower extremity. These findings are consistent with developmental dysplasia of the hip (DDH), which is often associated with a poorly developed acetabulum.
- Other Likely diagnoses
- D) Displacement of the capital femoral epiphysis: This condition, also known as slipped capital femoral epiphysis (SCFE), can cause a limp and limited hip mobility. However, it typically presents with pain and is more common in older children and adolescents.
- Do Not Miss
- B) Acute suppurative arthritis: Although less likely, given the patient's painless presentation, acute suppurative arthritis is a serious condition that requires prompt diagnosis and treatment to prevent long-term joint damage.
- Rare diagnoses
- A) Acute epiphyseal fracture: This is an unlikely diagnosis, given the patient's age and presentation, but it is a possible cause of a limp and limited mobility.
- C) Avulsion of muscle origin: This is also an unlikely diagnosis, as it typically presents with pain and is more common in older children and adolescents.
- E) Failure of osteoid to mineralize: This condition, also known as rickets, can cause bone deformities and weakness, but it is less likely given the patient's presentation and lack of other symptoms.