Format
Items per page

Send to:

Choose Destination

Search results

Items: 8

1.

Primary autosomal recessive microcephaly 1

Primary microcephaly refers to the clinical finding of a head circumference more than than 3 standard deviations (SD) below the age- and sex-related mean, present at birth. Primary microcephaly is a static developmental anomaly, distinguished from secondary microcephaly, which refers to a progressive neurodegenerative condition. Microcephaly is a disorder of fetal brain growth; individuals with microcephaly have small brains and almost always have mental retardation, although rare individuals with mild microcephaly (-3 SD) and normal intelligence have been reported. Additional clinical features may include short stature or mild seizures. MCPH is associated with a simplification of the cerebral cortical gyral pattern and a slight reduction in the volume of the white matter, consistent with the small size of the brain, but the architecture of the brain in general is normal, with no evidence of a neuronal migration defect (review by Woods et al., 2005). Most cases of primary microcephaly show an autosomal recessive mode of inheritance. Because MCPH directly affects neurogenesis, or neurogenic mitosis, rather than growth of the skull, some prefer the term 'micrencephaly' (Hofman, 1984). MCPH1 in particular is associated with premature chromosome condensation in cell studies (Darvish et al., 2010). Genetic Heterogeneity of Primary Microcephaly Primary microcephaly is a genetically heterogeneous disorder. See MCPH2 (604317), caused by mutation in the WDR62 gene (613583) on chromosome 19q13; MCPH3 (604804), caused by mutation in the CDK5RAP2 gene (608201) on 9q33; MCPH4 (604321), caused by mutation in the CASC5 gene (609173) on 15q14; MCPH5 (608716), caused by mutation in the ASPM gene (605481) on 1q31; MCPH6 (608393), caused by mutation in the CENPJ gene (609279) on 13q12; MCPH7 (612703), caused by mutation in the STIL gene (181590) on 1p33; MCPH8 (614673), caused by mutation in the CEP135 gene (611423) on 4q12; MCPH9 (614852), caused by mutation in the CEP152 gene (613529) on 15q21; MCPH10 (615095), caused by mutation in the ZNF335 gene (610827) on 20q13; MCPH11 (615414), caused by mutation in the PHC1 gene (602978) on 12p13; MCPH12 (616080), caused by mutation in the CDK6 gene (603368) on 7q21; MCPH13 (616051), caused by mutation in the CENPE gene (117143) on 4q24; MCPH14 (616402), caused by mutation in the SASS6 gene (609321) on 1p21; MCPH15 (616486), caused by mutation in the MFSD2A gene (614397) on 1p34; MCPH16 (616681), caused by mutation in the ANKLE2 gene (616062) on 12q24; MCPH17 (617090), caused by mutation in the CIT gene (605629) on 12q24; MCPH18 (617520), caused by mutation in the WDFY3 gene (617485) on 4q21; and MCPH19 (617800), caused by mutation in the COPB2 gene (606990) on 3q23; MCPH20 (617914), caused by mutation in the KIF14 gene (611279) on 1q31; MCPH21 (617983), caused by mutation in the NCAPD2 gene (615638) on 12p13; MCPH22 (617984), caused by mutation in the NCAPD3 gene (609276) on 11q25; MCPH23 (617985), caused by mutation in the NCAPH gene (602332) on 2q11; MCPH24 (618179), caused by mutation in the NUP37 gene (609264) on 12q23; and MCPH25 (618351), caused by mutation in the MAP11 gene (618350) on 7q22. [from OMIM]

MedGen UID:
344415
Concept ID:
C1855081
Disease or Syndrome
2.

Primary autosomal recessive microcephaly 5

Autosomal recessive primary microcephaly-5 (MCPH5) is characterized by decreased occipitofrontal circumference (OFC), usually less than 3 standard deviations (SD) of the mean, present at birth and associated with mental retardation and speech delay. Other features may include short stature or mild seizures. MCPH5 is associated with a simplification of the cerebral cortical gyral pattern in some cases, which is considered within the phenotypic spectrum of primary microcephaly (review by Woods et al., 2005; Saadi et al., 2009; Passemard et al., 2009). For a general phenotypic description and a discussion of genetic heterogeneity of primary microcephaly (MCPH), see MCPH1 (251200). [from OMIM]

MedGen UID:
373344
Concept ID:
C1837501
Disease or Syndrome
3.

Primary autosomal recessive microcephaly 2

Microcephaly-2 with or without cortical malformations is an autosomal recessive neurodevelopmental disorder showing phenotypic variability. Classically, primary microcephaly is a clinical diagnosis made when an individual has a head circumference more than 3 standard deviations (SD) below the age- and sex-matched population mean, and mental retardation with no other associated malformations and with no apparent etiology (Hofman, 1984). Patients with WDR62 mutations have head circumferences ranging from low-normal to severe (-9.8 SD), and most patients with brain scans have shown various types of cortical malformations. All have delayed psychomotor development; seizures are variable (summary by Yu et al., 2010). For a general phenotypic description and a discussion of genetic heterogeneity of primary microcephaly, see MCPH1 (251200). [from OMIM]

MedGen UID:
346929
Concept ID:
C1858535
Disease or Syndrome
4.

Primary autosomal recessive microcephaly 9

Primary microcephaly (MCPH) is a clinical diagnosis made when an individual has a head circumference more than 3 standard deviations below the age- and sex-matched population mean and mental retardation, with no other associated malformations and with no apparent etiology. Most cases of primary microcephaly show an autosomal recessive mode of inheritance (Woods et al., 2005). For a general phenotypic description and a discussion of genetic heterogeneity of primary microcephaly, see MCPH1 (251200). [from OMIM]

MedGen UID:
766800
Concept ID:
C3553886
Disease or Syndrome
5.

Primary autosomal recessive microcephaly

Autosomal recessive primary microcephaly (MCPH) is a rare genetically heterogeneous disorder of neurogenic brain development with features of reduced head circumference at birth with no gross anomalies of brain architecture and variable degrees of intellectual impairment. It is more common in specific populations, e.g. northern Pakistanis. Consanguinity appears to play a role in incidence. Patients have a reduction in head circumference at birth of at least 2 standard deviations below ethnically matched, age- and sex-related mean values. Caused by mutations in MCPH1, WDR62, CDK5RAP2, CEP152, ASPM, CENPJ, STIL, CEP63, CEP135 , CASC5 and PHC1. These mutations appear to lead to reduced generation of cerebral cortical neurons during embryonic neurogenesis. Inheritance is autosomal recessive. [from SNOMEDCT_US]

MedGen UID:
777995
Concept ID:
C3711387
Disease or Syndrome
6.

Primary autosomal recessive microcephaly 4

Primary microcephaly (MCPH) is a clinical diagnosis made when an individual has a head circumference more than 3 standard deviations below the age- and sex-matched population mean and mental retardation, with no other associated malformations and with no apparent etiology. Most cases of primary microcephaly show an autosomal recessive mode of inheritance (summary by Woods et al., 2005). For a general phenotypic description and a discussion of genetic heterogeneity of primary microcephaly, see MCPH1 (251200). [from OMIM]

MedGen UID:
347655
Concept ID:
C1858516
Disease or Syndrome
7.

Primary autosomal recessive microcephaly 10

Primary microcephaly-10 (MCPH10) is an autosomal recessive disorder characterized by extremely small head size (-9 SD) at birth and death usually by 1 year of age. Neuropathologic examination shows severe loss of neurons as well as neuronal loss of polarity and abnormal dendritic maturation (summary by Yang et al., 2012). For a general phenotypic description and a discussion of genetic heterogeneity of primary microcephaly, see MCPH1 (251200). [from OMIM]

MedGen UID:
767413
Concept ID:
C3554499
Disease or Syndrome
8.

Microcephaly 17, primary, autosomal recessive

Autosomal recessive primary microcephaly-17 (MCPH17) is a severe neurologic disorder characterized by very small head circumference that is apparent at birth and worsens over time (up to -12 SD). Affected individuals have delayed psychomotor development, intellectual disability, spasticity, axial hypotonia, and dysmorphic features. Brain imaging shows a simplified gyral pattern; more severe cases have lissencephaly with hypoplasia of the brainstem and cerebellum (summary by Harding et al., 2016). For a phenotypic description and a discussion of genetic heterogeneity of primary microcephaly, see MCPH1 (251200). [from OMIM]

MedGen UID:
934690
Concept ID:
C4310723
Disease or Syndrome
Format
Items per page

Send to:

Choose Destination

Supplemental Content

Find related data

Search details

See more...

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...
Support Center