Blount's disease

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Classification according to ICD-10
M92.5 Juvenile osteochondrosis of the tibia and fibula
- Osteochondrosis of the medial condyle of the tibia (Blount's disease)
- Tibia vara (Blount-Barber's disease)
ICD-10 online (WHO version 2019)

The Blount disease , also Blount's syndrome or Erlacher-Blount's syndrome is the childhood form of the tibia Vara (in humans), a deformation of the shank bone growth as a result of disruption of the medial epiphyseal . The disease was named after the first person to describe it, Walter Putnam Blount (1900-1992). The disease is rare but is more common among the African-born population of South Africa .

Two forms can be distinguished:

  • Infantile form in children under 10 years of age, usually in the first few years of life, usually occurring on both sides
  • Adolescents, juveniles or late forms mostly between 8 and 15 years of age and appearing unilaterally, often with premature closure of the growth plate and necrosis on the adjacent epiphysis .

Must be distinguished are deformities due to rickets and premature epiphyseal closure of other, mostly post-traumatic genesis.

X-ray of a 5½ year old girl with bilateral Blount stage II disease
X-ray of a girl with bilateral Blount's disease, stage V on the right and stage IV on the left

Classification

According to Langeskjöld, various prognostic and therapy-relevant stages can be distinguished:

  • Stage I: Varus deformity with irregularity of the growth plate and medial hook formation
  • Stage II: Lowering of the tibial metaphysis medially with a slight incline
  • Stage III: Clear varus and pronounced hook medially, possibly fragmentation of the metaphysis medially
  • Stage IV: Narrowing of the growth plate with a clear inclination
  • Stage V: Additional deformation and division of the epiphysis
  • Stage VI: Bridging between the epiphysis and metaphysis, also with partial fusion of the fragmented epiphysis to the medial metaphysis.

treatment

Treatment is usually conservative with splints.

See also

Individual evidence

  1. ↑ F. Hefti: Pediatric Orthopedics in Practice . Springer 1998, ISBN 3-540-61480-X .
  2. ↑ A. Langeskjöld (1952): tibia vara (osteochondrosis deformans tibiae): a survey of seventy-one cases, In: Acta Chirurgica Scandinavica 103, page 1-22

Web links

literature

  • A. Greenspan: Orthopedic Radiology. A practical approach. 3rd edition, Lippincott Williams & Wilkins, 2000, ISBN 0-7817-1589-X
  • F. Hefti: Children's orthopedics in practice . Springer 1998, ISBN 3-540-61480-X .