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Ehlers-Danlos syndrome, type 4
Vascular Ehlers-Danlos syndrome (vEDS) is characterized by arterial, intestinal, and/or uterine fragility; thin, translucent skin; easy bruising; characteristic facial appearance (thin vermilion of the lips, micrognathia, narrow nose, prominent eyes); and an aged appearance to the extremities, particularly the hands. Vascular dissection or rupture, gastrointestinal perforation, or organ rupture are the presenting signs in most adults with vEDS. Arterial rupture may be preceded by aneurysm, arteriovenous fistulae, or dissection but also may occur spontaneously. The majority (60%) of individuals with vEDS who are diagnosed before age 18 years are identified because of a positive family history. Neonates may present with clubfoot, hip dislocation, limb deficiency, and/or amniotic bands. Approximately half of children tested for vEDS in the absence of a positive family history present with a major complication at an average age of 11 years. Four minor diagnostic features – distal joint hypermobility, easy bruising, thin skin, and clubfeet – are most often present in those children ascertained without a major complication. [from GeneReviews]
Anti-glomerular basement membrane disease
Goodpasture syndrome, also known as anti-GBM disease, is a rare autoimmune disease consisting of alveolar hemorrhage and glomerulonephritis secondary to circulating antiglomerular basement membrane (anti-GBM) antibodies. Anti-GBM antibodies are directed against an antigen intrinsic to the alpha-3 chain of type IV collagen (COL4A3; 120070) that is expressed in the GBMs of the glomerular capillary loops and the basal membrane of the pulmonary alveoli. Goodpasture syndrome is suspected in patients with hemoptysis and hematuria and is confirmed by the presence of anti-GBM antibodies in renal biopsy specimens and serum. Patients with human leukocyte antigen HLA-DR15 and HLA-DR4 are susceptible to the development of Goodpasture syndrome. Reported cases of familial Goodpasture syndrome are extremely rare (summary by Angioi et al., 2017). [from OMIM]
Nodular pattern on pulmonary HRCT
A nodular pattern is characterized on pulmonary high-resolution computed tomography by the presence of numerous rounded opacities that range from 2 mm to 1 cm in diameter, with micronodules defined as smaller than 3 mm in diameter. [from HPO]
Interstitial lung disease due to ABCA3 deficiency
For a general phenotypic description and a discussion of genetic heterogeneity of pulmonary surfactant metabolism dysfunction, see SMDP1 (265120). [from OMIM]
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