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The authors describe three cases of familial acrocephalosyndactyly (ACS) in two boys (9 and 3 years of age) and in their 7.5-year old sister. In addition, irregularities in skull and limbs were found in the 46-year old father as well as in two other children, i.e., two girls, 14 and 4 years of age. The mother (46 years-old) and the remaining four 4 boys (12-, 9-, and 7-years-old), as well as the youngest child, a son, 1-year-old) did not show any deviations. The diagnosis of the Saethre-Chotzen syndrome in six members of one family was based on the finding of a typical skull deformation (oxybrachycephalia), low hairline, flattened nasofrontal angle, lateral deviation of the nasal septum, facial dysmorphy, prolapse of upper eyelids, antimongoloid placement of palpebral fissures, protruding eyes, hypertelorism, dysmorphy of auricles, imperfect hearing, highly arched palate, improper dentition, and characteristic skin syndactyly of hands and feet. In addition, deformed chest, weight and height deficiency, significant mental retardation, as well as, in the boys, true cryptorchidism were found. Radiological examination showed, in all affected members of the family, intensified digitate impressions within the whole fornix of the skull, large and deep sella turcica, underdeveloped frontal bone and upper jaw bone, untypical syndactyly of hands and feet, and the partial bifid of distal phalanges of the great toes, not described previously in the Saethre-Chotzen syndrome. In the differential diagnosis, other forms of ACS, i.e., Apert, Vogt, Pfeiffer, Summitt, and Herrmann-Opitz syndromes, were not found. Manifestation of the described symptoms transferred autosomally, dominantly, and with a similar degree of expression in 6 of 11 members of one family, leads us to think that they are the consequence of a fresh mutation revealed in the father.
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PMID:The Saethre-Chotzen syndrome with partial bifid of the distal phalanges of the great toes. Observations of three cases in one family. 745 Jul 76

Saethre-Chotzen syndrome is a form of acrocephalosyndactyly with autosomal dominant inheritance, characterized by craniosynostosis, facial asymmetry, palpebral ptosis, deviated nasal septum, partial cutaneous syndactyly, and various skeletal abnormalities. We studied in detail the neurological, EEG, and neuroradiological features of a group of 11 (6 male, 5 female) patients with Saethre-Chotzen syndrome. Four subjects were affected by seizures; they had paroxysmal EEG abnormalities, and gross neuroimaging revealed destructive brain lesions or malformations. Our findings suggest that CNS involvement in Saethre-Chotzen syndrome might be more severe than previously reported and support the wider use of neurophysiological and neuroimaging techniques in the study of children with this syndrome.
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PMID:Saethre-Chotzen syndrome: a clinical, EEG and neuroradiological study. 911 34

A 38-year-old man presented with an unusual complaint of spontaneous left ocular prolapse, which had occurred while scratching his lower eyelid. He was noted to have an atypical facial appearance with frontal bossing and maxillary hypoplasia. Examination of the hands revealed bilateral syndactyly, suggesting a diagnosis of acrocephalosyndactyly. While it is common for eyes to prolapse in childhood in Crouzon or Apert syndrome, it is unusual for them to present in this way in middle age. It may be that age-related loss of tissue elasticity and consequent lower eyelid laxity decreased the inferior support of the globe, explaining the late presentation.
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PMID:Spontaneous ocular prolapse as an unusual late presentation of acrocephalosyndactyly. 1788 1

Saethre-Chotzen syndrome (acrocephalosyndactyly type III) is a craniosynostosis syndrome inherited in an autosomal dominant manner. Although similar to the other craniosynostosis syndromes in its clinical presentation, this syndrome is caused by a mutation in the TWIST1 gene. The TWIST1 gene product is a transcription factor containing a basic helix-loop-helix (bHLH) domain important in the development of the head and limbs. Clinical features of this syndrome include unilateral or bilateral coronal synostosis, ptosis, low-set ears, hearing loss, hypertelorism, maxillary hypoplasia, deviated nasal septum, broad great toes, clinodactyly, and syndactyly. We report a young girl with clinical features of Saethre-Chotzen syndrome who has a previously undescribed sequence variant in the TWIST1 gene, corresponding to p.R191M. The location of the altered amino acid in the Twist-box of TWIST1, the high conservation of this amino acid between different species, and the phenotype of the child all support a pathogenic role for this novel TWIST1 sequence alteration.
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PMID:Saethre-Chotzen syndrome: a case report. 1986 Apr 90