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Items: 8

1.

Osteodysplastic primordial dwarfism, type 1

Microcephalic osteodysplastic primordial dwarfism type I (MOPD1) is a severe autosomal recessive skeletal dysplasia characterized by dwarfism, microcephaly, and neurologic abnormalities, including mental retardation, brain malformations, and ocular/auditory sensory deficits. Patients often die in early childhood (summary by Pierce and Morse, 2012). [from OMIM]

MedGen UID:
347149
Concept ID:
C1859452
Disease or Syndrome
2.

X-linked complicated corpus callosum dysgenesis

L1 syndrome involves a phenotypic spectrum ranging from severe to mild and includes three clinical phenotypes: X-linked hydrocephalus with stenosis of the aqueduct of Sylvius (HSAS). MASA (mental retardation [intellectual disability], aphasia [delayed speech], spastic paraplegia [shuffling gait], adducted thumbs) syndrome including X-linked complicated hereditary spastic paraplegia type 1. X-linked complicated corpus callosum agenesis. Males with HSAS are born with severe hydrocephalus, adducted thumbs, and spasticity; intellectual disability is severe. In less severely affected males, hydrocephalus may be subclinically present and documented only because of developmental delay; intellectual disability ranges from mild (IQ: 50-70) to moderate (IQ: 30-50). It is important to note that all phenotypes can be observed in affected individuals within the same family. [from GeneReviews]

MedGen UID:
374339
Concept ID:
C1839909
Disease or Syndrome
3.

Agenesis of corpus callosum, cardiac, ocular, and genital syndrome

Agenesis of corpus callosum, cardiac, ocular, and genital syndrome (ACOGS) is a syndromic neurodevelopmental disorder characterized by global developmental delay and/or intellectual disability, corpus callosum agenesis or hypoplasia, craniofacial dysmorphisms, and ocular, cardiac, and genital anomalies (Accogli et al., 2019). [from OMIM]

MedGen UID:
1718475
Concept ID:
C5394523
Disease or Syndrome
4.

Progressive myoclonic epilepsy type 9

Progressive myoclonic epilepsy-9 (EPM9) is an autosomal recessive disorder characterized by onset of myoclonic seizures between 6 and 7 years of age, with progression to falling and tonic-clonic seizures, severe action myoclonus, and neurologic decline. Diffuse muscle wasting and loss of subcutaneous fat are present (Damiano et al., 2015). For a discussion of genetic heterogeneity of progressive myoclonic epilepsy, see EPM1A (254800). [from OMIM]

MedGen UID:
901242
Concept ID:
C4225289
Disease or Syndrome
5.

Cerebrooculonasal syndrome

A multisystem malformation syndrome that has been reported in about 10 patients. The clinical features include bilateral anophthalmia, abnormal nares, central nervous system anomalies, and neurodevelopmental delay. Additional features include brachycephaly and other facial anomalies. Non-facial anomalies have also been reported: postaxial polydactyly, genital hypoplasia. All cases reported so far have been sporadic, suggesting that the syndrome may be due to a new dominant mutation. [from SNOMEDCT_US]

MedGen UID:
340138
Concept ID:
C1854108
Disease or Syndrome
6.

Gaze palsy, familial horizontal, with progressive scoliosis, 2

MedGen UID:
1393733
Concept ID:
C4479640
Disease or Syndrome
7.

Holoprosencephaly 14

Holoprosencephaly-14 (HPE14) is an autosomal recessive condition characterized by severe developmental delay secondary to brain malformations within the holoprosencephaly spectrum (Drissi et al., 2022). For general phenotypic information and a discussion of genetic heterogeneity of holoprosencephaly, see HPE1 (236100). [from OMIM]

MedGen UID:
1811868
Concept ID:
C5676994
Disease or Syndrome
8.

Congenital disorder of deglycosylation 2

Congenital disorder of deglycosylation-2 (CDDG2) is an autosomal recessive disorder with variable associated features such as dysmorphic facies, impaired intellectual development, and brain anomalies, including polymicrogyria, interhemispheric cysts, hypothalamic hamartoma, callosal anomalies, and hypoplasia of brainstem and cerebellar vermis (Maia et al., 2022). For a discussion of genetic heterogeneity of congenital disorder of deglycosylation, see CDGG1 (615273). [from OMIM]

MedGen UID:
1809253
Concept ID:
C5676931
Disease or Syndrome

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