mutations in the gjb2 gene at the dfnb1 locus on chromosome 13q12 are associated with autosomal recessive non syndromic hearing loss (arnshl) in many populations. a single mutation, at position 35 (35delg) accounts for approximately 30-63% of mutations in white populations with a carrier frequency of 1.5-2.5% in most european, north american and mediterranean populations. in this study we have ...

background robinow syndrome is a rare congenital disorder with phenotypically heterogeneous abnormalities. two modes of inheritances are known for this syndrome namely autosomal recessive and autosomal dominant. case report we describe here an eighteen-month-old child who had mesomelic short stature, abnormal facial features, clinodactyly, micropenis and vertebral changes which were further sup...

hallervorden-spatz syndrome is a disorder characterized by dystonia, parkinsonism, and iron accumulation in the brain. the disease is caused by mutations in gene encoding pantothenate kinase 2 (pank2) and patients have pantothenate kinase-associated neurodegeneration. we present an 8-year-old boy with progressive muscle dystonia, neuroregression, frequent fall and multiple injury marks of diffe...

Pseudoxanthoma elasticum (PXE) is a classic inherited disorder of the elastic tissue characterized by progressive calcification of elastic fibers with a pathognomonic histological appearance. The clinical manifestations of PXE typically involve the skin, the eye and the cardiovascular system, resulting in skin lesions, decreased vision and vascular disease. Clinically, a more common autosomal r...

ellis-van creveld syndrome is transmitted as an autosomal recessive trait. this syndrome is accompanied in 60% of cases with congenital heart disease, mostly single atrium or large asd. patients are mostly symptomatic, but in this rare case despite 68 years of age, the patient was free of symptoms except for complete heart block for which pacemaker was inserted