Congenital Absence of Limb or Part of it

 1. Failure of Formation

 2. Failure of Differentiation

 3 . Duplication

  4. Overgrowth

  5. Constriction band syndrome

  6. Miscellaneous

   7. Generalized skeletal abnormalities


 Failure of formation

 Transverse 

  Longitudinal 

    Pre-axial - Hypoplasia -thumb/ radius

    Post-axial - Ulnar Hypoplasia 

    Central - Cleft hand

    Intercalalted arrest- Phocomelia 



https://www.semanticscholar.org/paper/Nomenclature-for-congenital-skeletal-limb-a-of-the-Burtch/25d83583b0d67c1d3edc2f11e33a4db8ea5da45b/figure/0

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