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Most persons with Pfeiffer syndrome type 1 have a normal intelligence and life span; types 2 and 3 typically cause neurodevelopmental disorders and early death. Later in life, surgery can help in bone formation and facial construction. Pfeiffer syndrome affects about 1 in 100,000 persons.
Acrocephalosyndactyly. Acrocephalosyndactyly is a group of congenital conditions characterized by irregular features of the face and skull ( craniosynostosis) and hands and feet ( syndactyly ). [1] Craniosynostosis occurs when the cranial sutures, the fibrous tissue connecting the skull bones, fuse the cranial bones early in development.
Life expectancy. A 2008 paper found a U-shaped association between paternal age and the overall mortality rate in children (i.e., mortality rate up to age 18). Although the relative mortality rates were higher, the absolute numbers were low, because of the relatively low occurrence of genetic abnormality.
Carpenter syndrome. Carpenter syndrome, also called acrocephalopolysyndactyly type II, [1] is an extremely rare autosomal recessive [2] congenital disorder characterized by craniofacial malformations, obesity, syndactyly, and polydactyly. [2] Acrocephalopolysyndactyly is a variation of acrocephalosyndactyly that presents with polydactyly.
Crouzon syndrome is an autosomal dominant genetic disorder known as a branchial arch syndrome. Specifically, this syndrome affects the first branchial (or pharyngeal) arch, which is the precursor of the maxilla and mandible. Because the branchial arches are important developmental features in a growing embryo, disturbances in their development ...
A British study from 2008 found a median estimated life expectancy of 8.7 years for patients with Hurler syndrome. In comparison, the median life expectancy for all forms of MPS type I was 11.6 years. Patients who received successful bone marrow transplants had a 2-year survival rate of 68% and a 10-year survival rate of 64%. Patients who did ...
Trapezoidocephaly-synostosis syndrome, [1] Antley–Bixler syndrome has an autosomal recessive pattern of inheritance. Specialty. Medical genetics. Antley–Bixler syndrome is a rare, severe autosomal recessive [2] congenital disorder characterized by malformations and deformities affecting the majority of the skeleton and other areas of the ...
Charles I. Scott Jr. Aarskog–Scott syndrome ( AAS) is a rare disease inherited as X-linked and characterized by short stature, facial abnormalities, skeletal and genital anomalies. [2] This condition mainly affects males, although females may have mild features of the syndrome. [3] [4]
Saethre–Chotzen syndrome (SCS), also known as acrocephalosyndactyly type III, is a rare congenital disorder associated with craniosynostosis (premature closure of one or more of the sutures between the bones of the skull). This affects the shape of the head and face, resulting in a cone-shaped head and an asymmetrical face.
Achondroplasia. Achondroplasia is a genetic disorder with an autosomal dominant pattern of inheritance whose primary feature is dwarfism. [3] It is the most common cause of dwarfism [4] and affects about 1 in 27,500 people. [3] In those with the condition, the arms and legs are short, while the torso is typically of normal length. [3]