Hepatomegaly, and Oral cleft

Short-rib thoracic dysplasia (SRTD) with or without polydactyly refers to a group of autosomal recessive skeletal ciliopathies that are characterized by a constricted thoracic cage, short ribs, shortened tubular bones, and a 'trident' appearance of the acetabular roof. SRTD encompasses Ellis-van Creveld syndrome (EVC) and the disorders previously designated as Jeune syndrome or asphyxiating thoracic dystrophy (ATD), short rib-polydactyly syndrome (SRPS), and Mainzer-Saldino syndrome (MZSDS). Polydactyly is variably present, and there is phenotypic overlap in the various forms of SRTDs, which differ by visceral malformation and metaphyseal appearance. Nonskeletal involvement can include cleft lip/palate as well as anomalies of major organs such as the brain, eye, heart, kidneys, liver, pancreas, intestines, and genitalia. Some forms of SRTD are lethal in the neonatal period due to respiratory insufficiency secondary to a severely restricted thoracic cage, whereas others are compatible with life (summary by Huber and Cormier-Daire, 2012 and Schmidts et al., 2013).There is phenotypic overlap with the cranioectodermal dysplasias (Sensenbrenner syndrome; see CED1, {218330}).For a discussion of genetic heterogeneity of short-rib thoracic dysplasia, see SRTD1 (OMIM ).

SHORT-RIB THORACIC DYSPLASIA 8 WITH OR WITHOUT POLYDACTYLY; SRTD8 Is also known as srps6|short rib-polydactyly syndrome, type vi

• Short stature
• Failure to thrive
• Depressed nasal bridge
• Hepatomegaly
• Brachydactyly

SOURCES: OMIM MENDELIAN

Leukoencephalopathy-thalamus and brainstem anomalies-high lactate (LTBL) syndrome is a rare, genetic neurological disorder defined by early-onset of neurologic symptoms, biphasic clinical course, unique MRI features (incl. extensive, symmetrical, deep white matter abnormalities), and increased lactate in body fluids. The severe form is characterized by delayed psychomotor development, seizures, early-onset hypotonia, and persistently increased lactate levels. The mild form usually presents with irritability, psychomotor regression after six months of age, and temporary high lactate levels, with overall clinical improvement from the second year onward.

LEUKOENCEPHALOPATHY-THALAMUS AND BRAINSTEM ANOMALIES-HIGH LACTATE SYNDROME Is also known as coxpd12|combined oxidative phosphorylation defect type 12|ltbl|leukoencephalopathy with thalamus and brainstem involvement and high lactate

• Seizures
• Global developmental delay
• Generalized hypotonia
• Failure to thrive
• Cleft palate

SOURCES: ORPHANET OMIM MENDELIAN

• Seizures
• Neoplasm
• Muscle weakness
• Cleft palate
• Cryptorchidism

SOURCES: ORPHANET MENDELIAN

Amish lethal microcephaly is a very rare syndrome characterized by extreme microcephaly and early death, within the first year.

AMISH LETHAL MICROCEPHALY Is also known as thiamine metabolism dysfunction syndrome 3 (microcephaly type)|amish lethal microcephaly|thmd3

• Global developmental delay
• Generalized hypotonia
• Microcephaly
• Failure to thrive
• Micrognathia

SOURCES: MESH OMIM ORPHANET MENDELIAN

Short-rib thoracic dysplasia (SRTD) with or without polydactyly refers to a group of autosomal recessive skeletal ciliopathies that are characterized by a constricted thoracic cage, short ribs, shortened tubular bones, and a 'trident' appearance of the acetabular roof. SRTD encompasses Ellis-van Creveld syndrome (EVC) and the disorders previously designated as Jeune syndrome or asphyxiating thoracic dystrophy (ATD), short rib-polydactyly syndrome (SRPS), and Mainzer-Saldino syndrome (MZSDS). Polydactyly is variably present, and there is phenotypic overlap in the various forms of SRTDs, which differ by visceral malformation and metaphyseal appearance. Nonskeletal involvement can include cleft lip/palate as well as anomalies of major organs such as the brain, eye, heart, kidneys, liver, pancreas, intestines, and genitalia. Some forms of SRTD are lethal in the neonatal period due to respiratory insufficiency secondary to a severely restricted thoracic cage, whereas others are compatible with life (summary by Huber and Cormier-Daire, 2012 and Schmidts et al., 2013).There is phenotypic overlap with the cranioectodermal dysplasias (Sensenbrenner syndrome; see CED1, {218330}).For a discussion of genetic heterogeneity of short-rib thoracic dysplasia, see SRTD1 (OMIM ).

• Intellectual disability
• Short stature
• Hepatomegaly
• Brachydactyly
• Abnormality of the skeletal system

SOURCES: OMIM MENDELIAN

• Strabismus
• Cleft palate
• Cryptorchidism
• Hepatomegaly
• Ventricular septal defect

SOURCES: ORPHANET MENDELIAN

Short-rib thoracic dysplasia (SRTD) with or without polydactyly refers to a group of autosomal recessive skeletal ciliopathies that are characterized by a constricted thoracic cage, short ribs, shortened tubular bones, and a 'trident' appearance of the acetabular roof. SRTD encompasses Ellis-van Creveld syndrome (EVC) and the disorders previously designated as Jeune syndrome or asphyxiating thoracic dystrophy (ATD), short rib-polydactyly syndrome (SRPS), and Mainzer-Saldino syndrome (MZSDS). Polydactyly is variably present, and there is phenotypic overlap in the various forms of SRTDs, which differ by visceral malformation and metaphyseal appearance. Nonskeletal involvement can include cleft lip/palate as well as anomalies of major organs such as the brain, eye, heart, kidneys, liver, pancreas, intestines, and genitalia. Some forms of SRTD are lethal in the neonatal period due to respiratory insufficiency secondary to a severely restricted thoracic cage, whereas others are compatible with life (summary by Huber and Cormier-Daire, 2012 and Schmidts et al., 2013). There is phenotypic overlap with the cranioectodermal dysplasias (Sensenbrenner syndrome; see CED1, {218330}).SRTD15 is characterized by narrow thorax, oral and cardiovascular anomalies, short long bones, and postaxial polydactyly, in addition to other congenital anomalies. Considerable variability in features and in severity has been reported, with some affected individuals succumbing shortly after birth and others living to adulthood, even within the same family.For a discussion of genetic heterogeneity of short-rib thoracic dysplasia with or without polydactyly, see SRTD1 (OMIM ).

• Short stature
• Scoliosis
• Abnormal facial shape
• Low-set ears
• Depressed nasal bridge

SOURCES: OMIM MENDELIAN

• Microcephaly
• Hypertelorism
• Cleft palate
• Cryptorchidism
• Epicanthus

SOURCES: ORPHANET MENDELIAN

The peroxisomal biogenesis disorder (PBD) Zellweger syndrome (ZS) is an autosomal recessive multiple congenital anomaly syndrome. Affected children present in the newborn period with profound hypotonia, seizures, and inability to feed. Characteristic craniofacial anomalies, eye abnormalities, neuronal migration defects, hepatomegaly, and chondrodysplasia punctata are present. Children with this condition do not show any significant development and usually die in the first year of life (summary by Steinberg et al., 2006).For a complete phenotypic description and a discussion of genetic heterogeneity of Zellweger syndrome, see {214100}.Individuals with PBDs of complementation group 5 (CG5, equivalent to CG10 and CGF) have mutations in the PEX2 gene. For information on the history of PBD complementation groups, see {214100}.

• Intellectual disability
• Seizures
• Global developmental delay
• Generalized hypotonia
• Hypertelorism

SOURCES: OMIM MENDELIAN

Cranioectodermal dysplasia (CED), also known as Sensenbrenner syndrome, is a rare autosomal recessive heterogeneous ciliopathy that is primarily characterized by skeletal abnormalities, including craniosynostosis, narrow rib cage, short limbs, and brachydactyly, and ectodermal defects. Nephronophthisis leading to progressive renal failure, hepatic fibrosis, heart defects, and retinitis pigmentosa have also been described (summary by Arts et al., 2011).For a discussion of genetic heterogeneity of cranioectodermal dysplasia, see CED1 (OMIM ).

• Global developmental delay
• Short stature
• Hypertelorism
• Micrognathia
• Cleft palate

SOURCES: OMIM MENDELIAN