Which one of the following is the investigation of choice for evaluation of suspected Perthe’s disease ?
1) Plain X-ray
2) Ultrasonography (US)
3) Computed Tomography (CT)
4) Magnetic Resonance Imaging.
1) Plain X-ray
2) Ultrasonography (US)
3) Computed Tomography (CT)
4) Magnetic Resonance Imaging.
ANSWER 4) MRI
MRI is useful for the early detection of disease before
radiographic or scintigraphic findings become apparent.
 |
In LCP disease the normal high signal intensity of the femoral head epiphysis is low on T1W and T2W images. During the repair phase, fat-containing marrow returns to the epiphysis, and high signal intensity appears. |
| CDH | LCP | SCFE | |
|---|---|---|---|
| Age | Neonate | 5–8 years | Puberty |
| Sex | Females (estrogen) | Males | Overweight males |
| Cause | Joint laxity: femoral head falls out of acetabulum | Osteonecrosis | Salter-Harris 1 fracture |
| Imaging | Putti's triad | Subchondral fissure | Posterior slippage |
| US diagnostic | Fragmented epiphysis | Irregular growth plate |
