Genetic Disorders

Stickler Syndrome – Definition, Types, Causes and Treatment

Definition Stickler syndrome and related disorders are a group of inherited conditions characterized by ocular abnormalities, hearing loss, and skeletal or joint problems. Most individuals with this syndrome have a distinct facial appearance with a flattened midface, sometimes with the Pierre Robin sequence. The majority of cases are caused by …

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Refsum Disease – Causes, Pathophysiology and Complications

Definition Refsum disease is a genetic disorder that affects the metabolism of the fatty acid phytanic acid. When phytanic acid accumulates, it causes a number of progressive problems, including retinitis pigmentosa, peripheral neuropathy, anosmia, deafness, cerebellar ataxia and elevated protein concentrations in the cerebrospinal fluid in the absence of an …

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Prader-Willi syndrome – Complications, Risk Factors and Treatment

Definition Prader-Willi syndrome is a complex genetic condition that affects many parts of the body. In infancy, this condition is characterized by weak muscle tone (hypotonia), feeding difficulties, poor growth, and delayed development. Beginning in childhood, affected individuals develop an insatiable appetite, which leads to chronic overeating (hyperphagia) and obesity. …

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