Meyer dysplasia (also known as dysplasia epiphysealis capitis femoris) is a fragmentation and delayed ossification of the femoral capital epiphyses that affects the paediatric hips. It is considered more of a normal hip developmental variation rather than a true dysplasia. It can be bilateral in ~50% of cases 3.
It tends to present at around 2-3 years of age 2. There is a recognised male predilection 3.
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 4.
- 1. Specchiulli F, Scialpi L, Mastrorillo G. Meyer's dysplasia epiphysealis. Chir Organi Mov. 81 (4): 401-5. - Pubmed citation
- 2. Rowe SM, Chung JY, Moon ES et-al. Dysplasia epiphysealis capitis femoris: Meyer dysplasia. J Pediatr Orthop. 25 (1): 18-21. J Pediatr Orthop (link) - Pubmed citation
- 3. Khermosh O, Wientroub S. Dysplasia epiphysealis capitis femoris. Meyer's dysplasia. J Bone Joint Surg Br. 1991;73 (4): 621-5. J Bone Joint Surg Br (link) - Pubmed citation
- 4. Meyer J. Dysplasia epiphysealis capitis femoris : a clinical-radiological syndrome and its relationship to Legg-Calve-Perthes disease. Acta Orthop Scand 1964; 34:183-97.