Frequently Asked Questions > FAQ's about 1p36 Deletion Syndrome > Does the size of the deletion affect the amount and severity of the symptoms of 1p36 Deletion Syndrome?
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The size of the deletion, in general, does not predict the severity except for rare cases of very large deletions of 10 million base pairs or more. Most 1p36 deletions are smaller, with the average of about 4 Mb.