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Larsen-like syndrome, B3GAT3 type
CHST3-related skeletal dysplasia is characterized by short stature of prenatal onset, joint dislocations (knees, hips, radial heads), clubfeet, and limitation of range of motion that can involve all large joints. Kyphosis and occasionally scoliosis with slight shortening of the trunk develop in childhood. Minor heart valve dysplasia has been described in several persons. Intellect and vision are normal. [from GeneReviews]
Lowry-Wood syndrome
Lowry-Wood syndrome (LWS) is characterized by multiple epiphyseal dysplasia and microcephaly. Patients exhibit intrauterine growth retardation and short stature, as well as developmental delay and intellectual disability. Retinal degeneration has been reported in some patients (Farach et al., 2018; Shelihan et al., 2018). Microcephalic osteodysplastic primordial dwarfism type I (MOPD1; 210710) and Roifman syndrome (RFMN; 616651), the features of which overlap with those of Lowry-Wood syndrome, are also caused by biallelic mutation in the RNU4ATAC gene. [from OMIM]
Spondyloepimetaphyseal dysplasia with joint laxity, type 3
Spondyloepimetaphyseal dysplasia with joint laxity-3 (SEMDJL3) is characterized by multiple joint dislocations at birth, severe joint laxity, scoliosis, gracile metacarpals and metatarsals, delayed bone age, and poorly ossified carpal and tarsal bones (Girisha et al., 2016). For a discussion of genetic heterogeneity of SEMD with joint laxity, see SEMDJL1 (271640). [from OMIM]
Joint laxity, short stature, and myopia
A rare developmental defect with connective tissue involvement and characteristics of joint hyperextensibility and multiple dislocations of large joints, severe myopia and short stature. Other common features include retinal detachment, iris and chorioretinal coloboma, kyphoscoliosis and other spine deformities, pectus carinatum, talipes equinovarus and progressive hearing loss. [from SNOMEDCT_US]
Lethal Larsen-like syndrome
A rare developmental defect with connective tissue involvement characterized by multiple joint dislocations, flattened facial appearance, abnormal palmar creases, laryngotracheomalacia, and pulmonary hypoplasia. Additional signs may include a bifid tongue, micrognathia, non-immune hydrops fetalis, and brain dysplasia. The disease is lethal shortly after birth due to respiratory insufficiency. [from ORDO]
Neurodevelopmental disorder with hypotonia and dysmorphic facies
Neurodevelopmental disorder with hypotonia and dysmorphic facies (NEDHYDF) is characterized by global developmental delay and hypotonia apparent from birth. Affected individuals have variably impaired intellectual development, often with speech delay and delayed walking. Seizures are generally not observed, although some patients may have single seizures or late-onset epilepsy. Most patients have prominent dysmorphic facial features. Additional features may include congenital cardiac defects (without arrhythmia), nonspecific renal anomalies, joint contractures or joint hyperextensibility, dry skin, and cryptorchidism. There is significant phenotypic variability in both the neurologic and extraneurologic manifestations (summary by Tan et al., 2022). [from OMIM]
Ehlers-Danlos syndrome, classic-like, 3
Ehlers-Danlos syndrome classic-like-3 (EDSCLL3) is an autosomal dominant connective tissue disorder characterized by joint hypermobility and frequent joint dislocations, atrophic scarring, prolonged bleeding time, and age-related aortic dilatation and rupture (Hadar et al., 2024). For a discussion of genetic heterogeneity of classic-like Ehlers-Danlos syndrome, see 606408. For a discussion of the classificiation of Ehlers-Danlos syndrome, see EDSCL1 (130000). [from OMIM]
Multiple joint dislocation
Dislocation of many joints. [from HPO]
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