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'''Trisomy 13''', also known as '''Patau syndrome''', is a relatively common chromosomal abnormality. | '''Trisomy 13''', also known as '''Patau syndrome''', is a relatively common chromosomal abnormality. | ||
Features:<ref>Sherman, C. Recent advances in pathology (lecture). 9 May 2011.</ref><ref>URL: [http://johnsarm.net/Trisomy%2013%20%28Patau%29.htm http://johnsarm.net/Trisomy%2013%20%28Patau%29.htm]. Accessed on: 16 May 2011.</ref> | |||
*Midface abnormality - '''key feature'''. | *Midface abnormality - '''key feature'''. | ||
**An extreme example: holoprosencephaly - failure of the forebrain to divide into hemispheres.<ref>URL: [http://dictionary.reference.com/browse/Holoprosencephaly http://dictionary.reference.com/browse/Holoprosencephaly]. Accessed on: 16 May 2011.</ref> | **An extreme example: holoprosencephaly - failure of the forebrain to divide into hemispheres.<ref>URL: [http://dictionary.reference.com/browse/Holoprosencephaly http://dictionary.reference.com/browse/Holoprosencephaly]. Accessed on: 16 May 2011.</ref> |
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