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It is important to remember that while people with the diagnosis of 22q13 Deletion Syndrome/Phelan McDermid Syndrome are missing the same genetic material, they are affected in many different ways and at different severities.
The characteristics described in this sections are more common in the population with 22q13 Deletion than in the general population. They are more common, but not necessarily shared by all people with the deletion or even by the majority of them.
Percentages are used whenever possible to quantify the number of individuals with a specific attribute, but the tests and observations used to come up with the percentages were done on small sample fields due to the rarity of this diagnosis of the chromosomal abnormality.
It is also important to note that the majority of individuals examined with the deletion are young children so answers about long term abilities and issues are difficult to predict.
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