Depressed nasal bridge, and Chronic myelogenous leukemia

Achondroplasia is the most frequent form of short-limb dwarfism. Affected individuals exhibit short stature caused by rhizomelic shortening of the limbs, characteristic facies with frontal bossing and midface hypoplasia, exaggerated lumbar lordosis, limitation of elbow extension, genu varum, and trident hand (summary by Bellus et al., 1995).

• Intellectual disability
• Short stature
• Generalized hypotonia
• Hearing impairment
• Scoliosis

SOURCES: MESH OMIM MENDELIAN

• Intellectual disability
• Global developmental delay
• Short stature
• Generalized hypotonia
• Hearing impairment

SOURCES: OMIM MESH MENDELIAN

X-linked intellectual disability, Nascimento type is a rare X-linked intellectual disability syndrome characterized by intellectual disability (with severe speech impairment), a myxedematous appearance, dysmorphic facial features (including large head, synophrys, prominent supraorbital ridges, almond-shaped and deep-set eyes, large ears, wide mouth with everted lower lip and downturned lip corners), low posterior hairline, short, broad neck, marked general hirsutism and abnormal hair whorls, skin changes (e.g. dry skin or hypopigmented spots), widely spaced nipples, obesity, micropenis, onychodystrophy and seizures.

X-LINKED INTELLECTUAL DISABILITY, NASCIMENTO TYPE Is also known as mrxs30|mental retardation, x-linked, syndromic 30|x-linked intellectual disability-nail dystrophy-seizures syndrome

• Intellectual disability
• Seizures
• Depressed nasal bridge
• Macrocephaly
• Short neck

SOURCES: ORPHANET OMIM MENDELIAN

NEUROFIBROMATOSIS-NOONAN SYNDROME; NFNS Is also known as neurofibromatosis with noonan phenotype|noonan-neurofibromatosis syndrome

• Global developmental delay
• Short stature
• Scoliosis
• Hypertelorism
• Muscle weakness

SOURCES: ORPHANET OMIM MENDELIAN

Fanconi anemia (FA) is a clinically and genetically heterogeneous disorder that causes genomic instability. Characteristic clinical features include developmental abnormalities in major organ systems, early-onset bone marrow failure, and a high predisposition to cancer. The cellular hallmark of FA is hypersensitivity to DNA crosslinking agents and high frequency of chromosomal aberrations pointing to a defect in DNA repair (summary by Deakyne and Mazin, 2011).For additional general information and a discussion of genetic heterogeneity of Fanconi anemia, see {227650}.

• Global developmental delay
• Growth delay
• Hypertelorism
• Neoplasm
• Abnormal facial shape

SOURCES: OMIM MENDELIAN

Autosomal dominant anomaly characterized by abnormal ovoid shape GRANULOCYTE nuclei and their clumping chromatin. Mutations in the LAMIN B receptor gene that results in reduced protein levels are associated with the disorder. Heterozygote individuals are healthy with normal granulocyte function while homozygote individuals occasionally have skeletal anomalies, developmental delay, and seizures.

• Intellectual disability
• Global developmental delay
• Hypertelorism
• Failure to thrive
• Strabismus

SOURCES: OMIM MESH MENDELIAN

Knobloch syndrome (KS) is defined by vitreoretinal and macular degeneration, and occipital encephalocele.

KNOBLOCH SYNDROME Is also known as retinal detachment and occipital encephalocele|knobloch-layer syndrome|retinal detachment-occipital encephalocele syndrome|kno

• Seizures
• Global developmental delay
• Generalized hypotonia
• Ataxia
• Nystagmus

SOURCES: OMIM MESH ORPHANET MENDELIAN

Mosaic variegated aneuploidy is an autosomal recessive disorder characterized by mosaic aneuploidies, predominantly trisomies and monosomies, involving multiple different chromosomes and tissues. The proportion of aneuploid cells varies but is usually more than 25% and is substantially greater than in normal individuals. Affected individuals typically present with severe intrauterine growth retardation and microcephaly. Eye anomalies, mild dysmorphism, variable developmental delay, and a broad spectrum of additional congenital abnormalities and medical conditions may also occur. The risk of malignancy is high, with rhabdomyosarcoma, Wilms tumor, and leukemia reported in several cases (summary by Hanks et al., 2004). Genetic Heterogeneity of Mosaic Variegated Aneuploidy SyndromeSee also MVA2 (OMIM ), caused by mutation in the CEP57 gene (OMIM ) on chromosome 11q21, and MVA3 (OMIM ), caused by mutation in the TRIP13 gene (OMIM ) on chromosome 5p15.

MOSAIC VARIEGATED ANEUPLOIDY SYNDROME 1; MVA1 Is also known as mva syndrome

• Intellectual disability
• Seizures
• Global developmental delay
• Short stature
• Generalized hypotonia

SOURCES: OMIM MENDELIAN

Microcephaly with or without chorioretinopathy, lymphedema, or mental retardation is an autosomal dominant disorder that involves an overlapping but variable spectrum of central nervous system and ocular developmental anomalies. Microcephaly ranges from mild to severe and is often associated with mild to moderate developmental delay and a characteristic facial phenotype with upslanting palpebral fissures, broad nose with rounded tip, long philtrum with thin upper lip, prominent chin, and prominent ears. Chorioretinopathy is the most common eye abnormality, but retinal folds, microphthalmia, and myopic and hypermetropic astigmatism have also been reported, and some individuals have no overt ocular phenotype. Congenital lymphedema, when present, is typically confined to the dorsa of the feet, and lymphoscintigraphy reveals the absence of radioactive isotope uptake from the webspaces between the toes (summary by Ostergaard et al., 2012). Robitaille et al. (2014) found that MCLMR includes a broader spectrum of ocular disease, including retinal detachment with avascularity of the peripheral retina, and noted phenotypic overlap with familial exudative vitreoretinopathy (FEVR; see EVR1, {133780}).Birtel et al. (2017) observed intrafamilial and intraindividual variability in retinal phenotype, and noted that syndromic manifestations in some patients are too subtle to be detected during a routine ophthalmologic evaluation. Variable expressivity and reduced penetrance have also been observed in some families (Jones et al., 2014; Li et al., 2016).Autosomal recessive forms of microcephaly with chorioretinopathy have been reported (see {251270}).See also Mirhosseini-Holmes-Walton syndrome (autosomal recessive microcephaly with pigmentary retinopathy and mental retardation; {268050}), which has been mapped to chromosome 8q21.3-q22.1.

MICROCEPHALY WITH OR WITHOUT CHORIORETINOPATHY, LYMPHEDEMA, OR MENTAL RETARDATION; MCLMR Is also known as lymphedema, microcephaly, chorioretinopathy syndrome|cdmmr syndrome|mlcrd syndrome|lymphedema and retinal folds with microcephaly and microphthalmos|microcephaly and chorioretinopathy with or without mental retardation, autosomal dominant|microcephaly, ly

• Intellectual disability
• Seizures
• Global developmental delay
• Short stature
• Generalized hypotonia

SOURCES: OMIM MESH MENDELIAN

Nijmegen breakage syndrome is a rare genetic disease presenting at birth with microcephaly, dysmorphic facial features, becoming more noticeable with age, growth delay, and later-onset complications such as malignancies and infections.

NIJMEGEN BREAKAGE SYNDROME Is also known as microcephaly-immunodeficiency-lymphoreticuloma syndrome|ataxia-telangiectasia variant v1|microcephaly with normal intelligence, immunodeficiency, and lymphoreticular malignancies|at-v1|berlin breakage syndrome|ataxia-telangiectasia, variant 1|seemanova sy

• Intellectual disability
• Global developmental delay
• Short stature
• Microcephaly
• Ataxia

SOURCES: ORPHANET OMIM MESH MENDELIAN