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1.

RASopathy

A group of genetic disorders associated with mutation(s) in genes that are constituents of the RAS signaling pathway. These disorders are characterized by distinct facial features, developmental delays, cardiac defects, growth delays, and feeding problems. Representative examples include: neurofibromatosis type 1, capillary malformation-arteriovenous malformation syndrome, cardiofaciocutaneous syndrome, Costello syndrome, multiple lentigines syndrome, and Noonan syndrome. [from NCI]

MedGen UID:
1792298
Concept ID:
C5555857
Disease or Syndrome
2.

Thrombocytopenia 11 with multiple congenital anomalies and dysmorphic facies

Thrombocytopenia-11 with multiple congenital anomalies and dysmorphic facies (THC11) is a syndromic disorder characterized by dysmorphic facial features, multiple congenital anomalies that may involve the heart, brain, genitourinary, endocrine, and/or skeletal systems, chronic and persistent thrombocytopenia, sometimes with leukopenia or anemia, poor growth with microcephaly, hypotonia, and mildly impaired intellectual development or learning disabilities. The disorder results from constitutive activation of the RAS signaling pathway and can be considered a RASopathy (Niemann et al., 2020; Miller et al., 2022). For a discussion of genetic heterogeneity of thrombocytopenia, see 313900. [from OMIM]

MedGen UID:
1051748
Concept ID:
CN375875
Disease or Syndrome
3.

Noonan syndrome 14

Noonan syndrome-14 (NS14) is a recessive developmental disorder within the RASopathy clinical spectrum. Patients exhibit developmental delay, impaired intellectual development, and short stature, as well as distinctive dysmorphic features including bitemporal narrowing, hypertelorism, low-set posteriorly rotated ears, prominent nasal bridge, low posterior hairline with a short webbed neck, and pectus excavatum (Motta et al., 2021). For a general phenotypic description and discussion of genetic heterogeneity of Noonan syndrome, see NS1 (163950). [from OMIM]

MedGen UID:
1807988
Concept ID:
C5676916
Disease or Syndrome
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