[Congenital deformities of the hand and upper limb]

Congenital deformities of the hand and upper limb include a significant number of clinical situations. Their expression is, as in all congenital diseases, variable. Therefore, we can almost consider that each clinical situation is a bit unique. The difficulty, as any congenital disease, is the fact that the clinical cases are extremely diverse and difficult to classify. So what to do and surgical strategies are often matter of "School". This is even more true that the evaluation of results is very difficult due to low series (poor statistical value) and functional assessment to be partly due to the growth of the child. It is impossible in a few pages to describe all malformations of the hand and upper limb, summarize the indications and evaluate the results. Also, this chapter is not exhaustive and we will focus primarily on the most frequent pathologies.