Megalocornea-intellectual disability syndrome | |
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Other names | Neuhauser syndrome |
Specialty | Medical genetics |
Symptoms | Ocular and intellect symptoms |
Usual onset | Birth |
Duration | Lifelong |
Causes | Genetic mutation |
Prevention | none |
Prognosis | Medium |
Frequency | very rare, only 24 cases have been described in medical literature |
Deaths | - |
Megalocornea-intellectual disability syndrome, also known as Neuhauser syndrome, is a very rare genetic disorder which is characterized by megalocornea, hypotonia from birth, variable intellectual disabilities, psychomotor delays, developmental delays, and facial dysmorphisms such as round face, frontal bossing, antimongoloid slants of the eyes, epicanthal fold, large, low-set ears, broad nasal bridge, nostril anteversion, and increased length of the upper lip. [1] According to OMIM, [2] only 24 cases have been described in medical literature. [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13]
Lujan–Fryns syndrome (LFS) is an X-linked genetic disorder that causes mild to moderate intellectual disability and features described as Marfanoid habitus, referring to a group of physical characteristics similar to those found in Marfan syndrome. These features include a tall, thin stature and long, slender limbs. LFS is also associated with psychopathology and behavioral abnormalities, and it exhibits a number of malformations affecting the brain and heart. The disorder is inherited in an X-linked dominant manner, and is attributed to a missense mutation in the MED12 gene. There is currently no treatment or therapy for the underlying MED12 malfunction, and the exact cause of the disorder remains unclear.
Goldberg–Shprintzen is a very rare connective tissue condition associated with mutations in KIAA1279 gene which encodes KIF-binding protein (KBP), a protein that may interact with microtubules and actin filaments. KBP may play a key role in cytoskeleton formation and neurite growth.
Weismann-Netter–Stuhl syndrome, also known as Weismann-Netter syndrome or tibioperoneal diaphyseal toxopachyosteosis, is a rare disorder characterized by bowing of the lower legs and an abnormal thickening of thinner bone in the leg.
ZC4H2 is a protein-coding gene located on the X-chromosome. This gene encodes a protein which is a member of the so-called zinc finger domain-containing protein family. There is currently very limited understanding about the ZC4H2 gene and its protein function.
Ring chromosome 15 is a condition that arises when chromosome 15 fuses to form a ring chromosome. Usually, ring chromosome 15 forms due to the modification or deletion of genetic information on chromosome 15 in the preliminary stages of embryonic development, but it can rarely also be inherited.
Stocco dos Santos syndrome is an extremely rare multi-systemic genetic disorder which is present from birth. It is characterized by heart, skeletal, muscular abnormalities with accompanying intellectual disabilities.
Chudley-Mccullough syndrome is a rare genetic disorder which is characterized by bilateral congenital hearing loss associated with brain malformations. It is a type of syndromic deafness.
Brachydactyly-long thumb syndrome is a very rare genetic disorder which is characterized by symmetric brachydactyly of the fingers accompanied by an abnormally long thumb, hypomobility of the shoulder and metacarpo-phalangeal joints, and heart conduction defects. Small feet and hands, small shoulders accompanied with short clavicles, clinodactyly, pectus excavatum, mild limb shortening, cardiomegaly, and pulmonic stenosis murmur have also been reported. It was first discovered when D W Hollister et al. described 4 affected members belonging to a 3-generation family. No new cases have been reported since 1981. This disorder is inherited in an autosomal dominant manner.
Gustavson syndrome, also known as Severe X-linked intellectual disability, Gustavson type, is a rare genetic disorder which is characterized by severe intellectual disabilities, microcephaly, developmental delay, optic atrophy-induced severe vision impairment/loss, severe hearing loss, spasticity, epilepsy, hypomobility of major joints, facial dysmorphisms, and premature death. This disorder was first discovered in 1993, by Gustavson et al., when they described 7 male children from a 2-generation family, these children had the symptoms mentioned above, they came to the conclusion that this case was part of a novel X-linked recessive syndrome. No new cases have been reported since then (1993).
Camera-Marugo-Cohen syndrome, also known as Obesity, mental retardation, body asymmetry and muscle weakness syndrome is a very rare genetic disorder which is characterized by familial obesity, intellectual disabilities, body asymmetry, and muscular weakness. It is a type of syndromic obesity/obesity syndrome. 2 cases have been reported in medical literature
Acro-oto-radial syndrome, also known as Pseudopapilledema blepharophimosis hand anomalies syndrome is a very rare hereditary disorder which is characterized by pseudopapilledema, hearing loss, cranio-facial dysmorphisms and hand/foot anomalies. Unlike other genetic syndromes, people with this syndrome don't exhibit intellectual disabilities. Only 4 cases have been reported in medical literature.
Aphalangy-syndactyly-microcephaly syndrome is a very rare limb malformation syndrome which is characterized by agenesis of the distal phalanges, syndactyly, duplication of the fourth metatarsal, microcephaly, and mild intellectual disabilities. Only 6 cases from 4 families in Spain, Turkey and other countries have been reported in medical literature. Transmission is autosomal dominant.
Tranebjaerg-Svejgaard syndrome, also known as X-linked mental retardation associated with psoriasis is a very rare genetic disorder which is characterized by intellectual disabilities, psychomotor development delays, seizures, psoriasis, and cranio-facial dysmorphisms. It is a type of X-linked syndromic intellectual disability. Only 4 cases have been described in medical literature.
Growth delay-hydrocephaly-lung hypoplasia syndrome, also known as Game-Friedman-Paradice syndrome is a very rare hereditary disorder which is characterized by developmental, lung, and brain anomalies. Only 4 cases have been reported in medical literature.
Gollop-Wolfgang complex is a very rare genetic disorder which is characterized by skeletal and digital anomalies.
Trigonocephaly-bifid nose-acral anomalies syndrome is a very rare genetic disorder which is characterized by trigonobrachycephaly, narrow forehead, up-ward slanting parpebral fissures, bulbous, slightly bifid nose, macrostomia, thin upper lip, macrognathia(facial dysmorphisms), broad thumbs, rather large toes, broad fingertips with short nail beds, joint hypermobility and fifth finger clinodactyly(acral). Additional findings include short height, hypotonia and severe psychomotor retardation. It has been described in a brother and a sister born to healthy consanguineous Palestianian-Arab parents.
Ulna hypoplasia-intellectual disability syndrome is a very rare genetic disorder which is characterized by shortening of the arms associated with ulnar aplasia/hypoplasia, bilateral clubbed feet, widespread nail aplasia/hypoplasia, and severe psychomotor delays with intellectual disabilities. It has only been described in two siblings born to consanguineous Arab parents. It is thought to be inherited in an autosomal recessive manner.
Meacham syndrome is a rare genetic disorder which is characterized by lung, diaphragmatic and genitourinary anomalies.
Intellectual disability-spasticity-ectrodactyly syndrome, also known as Jancar syndrome, is a rare autosomal recessive genetic disorder which is characterized by severe intellectual disabilities, hereditary spastic paraplegia, and defects of the distal limbs, such as syndactyly, ectrodactyly, and clinodactyly. Only 3 families in England and Israel have been described in medical literature.
Splenogonadal fusion-limb defects-micrognathia syndrome, also known by its abbreviation, SGFLD syndrome, is a rare genetic disorder characterized by abnormal fusion of the spleen and the gonad alongside limb defects and orofacial anomalies. It is a type of syndromic dysostosis.