Clinical Records Hearing loss in the Saethre-Chotzen syndrome
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چکیده
A three-generation family with Saethre-Chotzen syndrome and an isolated case are presented. The proband presented with conductive hearing loss. His mother and grandmother showed minor features of the syndrome including conductive hearing loss. Symptoms of the craniosynostosis syndromes can include stapes ankylosis, a fixed ossicular chain in a too small epitympanum, and small or even absent mastoids. The proband was treated with a boneanchored hearing aid (BAHA) instead of reconstructive middle ear surgery. Current literature on the results of ear surgery is reviewed. In general, reconstructive middle ear surgery should only be considered if congenital anomalies of the middle ear are the only presenting symptom. In cases with additional anomalies such as atresia of the ear canal or damage due to chronic ear infections, the outcome of reconstructive surgery to correct the anomalous ossicular chain is unsatisfactory. In such cases the BAHA is probably the best solution.
منابع مشابه
Saethre-Chotzen syndrome: a case report.
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 dev...
متن کاملSaethre-Chotzen syndrome, Pro136His TWIST mutation, hearing loss, and external and middle ear structural anomalies: report on a Brazilian family.
OBJECTIVE To describe the clinical, speech, hearing, and imaging findings in three members of a Brazilian family with Saethre-Chotzen syndrome (SCS) who presented some unusual characteristics within the spectrum of the syndrome. DESIGN Clinical evaluation was performed by a multidisciplinary team. Direct sequencing of the polymerase chain reaction-amplified coding region of the TWIST1 gene, r...
متن کاملSaethre-Chotzen syndrome associated with balanced translocations involving 7p21: three further families.
We describe three families segregating different reciprocal chromosome translocations, t(7;18)(p21.2;q23), t(2;7)(q21.1;p21.2), and t(5;7)(p15.3;p21.2). A total of seven apparently balanced carriers have been identified and all manifest features of the Saethre-Chotzen syndrome, although only two have overt craniosynostosis. In one family the carriers are immediately recognisable by their unusua...
متن کاملThe TWIST gene, although not disrupted in Saethre-Chotzen patients with apparently balanced translocations of 7p21, is mutated in familial and sporadic cases.
The TWIST gene maps to 7p21 and mutations in the gene have been reported in the Saethre-Chotzen form of craniosynostosis. The position of the Saethre-Chotzen gene has previously been refined by FISH analysis of four patients carrying balanced translocations involving 7p21 which suggested that it was located between D7S488 and D7S503. We report here that the breakpoints in four translocation pat...
متن کاملIncreased bone formation and decreased osteocalcin expression induced by reduced Twist dosage in Saethre-Chotzen syndrome.
The Saethre-Chotzen syndrome is characterized by premature fusion of cranial sutures resulting from mutations in Twist, a basic helix-loop-helix (bHLH) transcription factor. We have identified Twist target genes using human mutant calvaria osteoblastic cells from a child with Saethre-Chotzen syndrome with a Twist mutation that introduces a stop codon upstream of the bHLH domain. We observed tha...
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