## Question
SUBJECT: Request for literature for Chromosome 16 duplication
MESSAGE: I have 3 week old who was admitted in our [LOCATION] for being growth retarded.  He was delivered term but weighed only 1.44 kg.  There was polyhydramnios during pregnancy but the rest of the antenatal scans did not detect any other abnormalities.
When the baby was born, we noted some dysmorphysm, namely:  small head, low set ears, round face with wide phlitrum, slight hyperteloris, wide spaced nipples, clinodactyly and stubby toes.  blood was sent for karyotype and showed 46XY,dup(16)(q13q23).
I looked up any information about this condition and could not find any on-line.
Can u please forward any literature you may have so as I can better appraise the parents of the prognosis and make a more detailed treatment plan for the patient.
Thank you

## Expert Summary
Where can I find information on chromosome 16 duplication, specifically karyotype 46XY,dup(16)(q13q23)?