Meyer dysplasia (also known as dysplasia epiphysealis capitis femoris) is a fragmentation and delayed ossification of the femoral capital epiphyses that affects the pediatric hips. It is considered more of a normal hip developmental variation rather than a true dysplasia. It can be bilateral in ~50% of cases .
It tends to present at around 2-3 years of age . There is a recognized male predilection .
Patients are usually asymptomatic.
There is a delay in development of the nucleus of ossification in the hip which does not occur until ~1.5 years of age. The epiphysis does not collapse and density and structure remain preserved. It usually resolves spontaneously later in childhood.
- the affected epiphysis is smaller in size
- there are often multiple nuclei of ossification, giving the epiphysis a "morulated" appearance; these then tend to fuse at ~5 years of age.
History and etymology
First described by J Meyer in 1964 .
On imaging consider