Monosomy 9p

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Monosomy 9p
Other names9p deletion syndrome
SpecialtyMedical genetics Edit this on Wikidata

Monosomy 9p (also known as Alfi's Syndrome or simply 9P-) is a rare chromosomal disorder in which there is deletion (monosomy) of a portion of chromosome 9. Symptoms include microgenitalia, intellectual disability with microcephaly and dysmorphic features.

The location has recently been narrowed to 9p22.2-p23.[1]

Various clinical features have been associated with this disease including trigonocephaly, flattened occiput, prominent forehead, broad flat nasal bridge, anteverted nares, malformed external ears, hypertelorism, and hypertonia.[2]


  1. ^ Kawara H, Yamamoto T, Harada N, et al. (February 2006). "Narrowing candidate region for monosomy 9p syndrome to a 4.7-Mb segment at 9p22.2-p23". Am. J. Med. Genet. A. 140 (4): 373–7. doi:10.1002/ajmg.a.31094. PMID 16419130.
  2. ^ "OMIM Entry - # 158170 - CHROMOSOME 9p DELETION SYNDROME". Retrieved 2017-03-10.

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