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University of Washington, Seattle 1993

GeneReviews®

Články mohou překládat pouze registrovaní uživatelé
Přihlášení Registrace
Odkaz je uložen do schránky
Cecilia Giunta
Marianne Rohrbach
Christine Fauth
Matthias Baumann

Klíčová slova

Abstraktní

CLINICAL CHARACTERISTICS
FKBP14 kyphoscoliotic Ehlers-Danlos syndrome (FKBP14-kEDS) is characterized by congenital muscle hypotonia and weakness (typically improving during childhood), progressive scoliosis, joint hypermobility, hyperelastic skin, gross motor developmental delay, myopathy, and hearing impairment. Most affected children achieve independent walking between ages two and four years. A decline of motor function in adulthood may be seen, but affected individuals are likely to be able to participate in activities of daily living in adulthood and maintain independent walking. Occasional features underlying systemic connective tissue involvement include aortic rupture and arterial dissection, subdural hygroma, insufficiency of cardiac valves, bluish sclerae, bladder diverticula, inguinal or umbilical herniae, and premature rupture of membranes during pregnancy. Rarer findings may include bifid uvula with submucous or frank cleft palate, speech/language delay without true cognitive impairment, and rectal prolapse.

DIAGNOSIS/TESTING
Clinical diagnostic criteria rely on the finding of congenital muscular hypotonia AND congenital or early-onset kyphoscoliosis in addition to generalized joint hypermobility or further gene-specific and/or supportive clinical features. The diagnosis of FKBP14-kEDS is established in a proband by the identification of biallelic pathogenic variants in FKBP14 by molecular genetic testing.

MANAGEMENT
Treatment of manifestations: In those with aortic dilation or vascular dissection, use of beta blockers may be considered; physical and occupational therapy to address age-dependent decline in muscular strength; standard treatment for severe scoliosis, clubbed foot, osteopenia/osteoporosis, refractive error, hearing impairment, and cleft palate. Surveillance: Blood pressure measurement at each visit; neurodevelopmental assessment at each visit until adolescence; evaluation by an orthopedic physician as clinically indicated but typically at least annually; periodic ophthalmology and hearing evaluations (e.g., every 2-3 years); DEXA scan, echocardiogram with consideration of cardiac MRI, and vascular ultrasonography every 2-5 years. Agents/circumstances to avoid: Sports that place stress on the joints; contact sports in those with an aortic aneurysm; hypertension. Pregnancy management: An increased risk for miscarriage, premature rupture of membranes, and rupture of arteries in affected pregnant women should be considered. Delivery in a medical center with a high-risk perinatologist in attendance is recommended.

GENETIC COUNSELING
FKBP14-kEDS is inherited in an autosomal recessive manner. Each sib of an affected individual has a 25% chance of being affected, a 50% chance of being an asymptomatic carrier, and a 25% chance of being unaffected and not a carrier. Carrier testing for at-risk relatives and prenatal testing for a pregnancy at increased risk are possible if both FKBP14 pathogenic variants have been identified in a family.

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