GTR Home > Conditions/Phenotypes > Adult junctional epidermolysis bullosa


Excerpted from the GeneReview: Junctional Epidermolysis Bullosa
Junctional epidermolysis bullosa (JEB) is characterized by fragility of the skin and mucous membranes, manifest by blistering with little or no trauma. Blistering may be severe and granulation tissue can form on the skin around the oral and nasal cavities, fingers and toes, and internally around the upper airway. Blisters generally heal with no significant scarring. Broad classification of JEB includes JEB generalized severe and JEB generalized intermediate. In JEB generalized severe, blisters are present at birth or become apparent in the neonatal period. Congenital malformations of the urinary tract and bladder may also occur. In JEB generalized intermediate, the phenotype may be mild with blistering localized to hands, feet, knees, and elbows with or without renal or ureteral involvement. Some individuals never blister after the newborn period. Additional features shared by JEB and the other major forms of epidermolysis bullosa (EB) include congenital localized absence of skin (aplasia cutis congenita), milia, nail dystrophy, scarring alopecia, hypotrichosis, pseudosyndactyly, and other contractures.

Available tests

71 tests are in the database for this condition.

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Genes See tests for all associated and related genes

  • Also known as: BA16H23.2, BP180, BPA-2, BPAG2, ERED, LAD-1, COL17A1
    Summary: collagen type XVII alpha 1 chain

  • Also known as: CD104, GP150, ITGB4
    Summary: integrin subunit beta 4

  • Also known as: BM600, E170, LAMNA, LOCS, LAMA3
    Summary: laminin subunit alpha 3

  • Also known as: AI1A, BM600-125KDA, LAM5, LAMNB1, LAMB3
    Summary: laminin subunit beta 3

  • Also known as: B2T, BM600, CSF, EBR2, EBR2A, LAMB2T, LAMNB2, LAMC2
    Summary: laminin subunit gamma 2

Clinical features


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