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Epidermolysis bullosa simplex 7, with nephropathy and deafness(EBS7)

MedGen UID:
323004
Concept ID:
C1836823
Disease or Syndrome
Synonyms: Nephropathy with pretibial epidermolysis bullosa and deafness; Nephrotic syndrome - deafness - pretibial epidermolysis bullosa syndrome
Modes of inheritance:
Autosomal recessive inheritance
MedGen UID:
141025
Concept ID:
C0441748
Intellectual Product
Source: Orphanet
A mode of inheritance that is observed for traits related to a gene encoded on one of the autosomes (i.e., the human chromosomes 1-22) in which a trait manifests in individuals with two pathogenic alleles, either homozygotes (two copies of the same mutant allele) or compound heterozygotes (whereby each copy of a gene has a distinct mutant allele).
 
Gene (location): CD151 (11p15.5)
 
Monarch Initiative: MONDO:0012190
OMIM®: 609057
Orphanet: ORPHA300333

Disease characteristics

Excerpted from the GeneReview: Epidermolysis Bullosa Simplex
Epidermolysis bullosa simplex (EBS) is characterized by fragility of the skin (and mucosal epithelia in some instances) that results in non-scarring blisters and erosions caused by minor mechanical trauma. EBS is distinguished from other types of epidermolysis bullosa (EB) or non-EB skin fragility syndromes by the location of the blistering in relation to the dermal-epidermal junction. In EBS, blistering occurs within basal keratinocytes. The severity of blistering ranges from limited to hands and feet to widespread involvement. Additional features can include hyperkeratosis of the palms and soles (keratoderma), nail dystrophy, milia, and hyper- and/or hypopigmentation. Rare EBS subtypes have been associated with additional clinical features including pyloric atresia, muscular dystrophy, cardiomyopathy, and/or nephropathy. [from GeneReviews]
Authors:
Jodi Y So  |  Joyce Teng   view full author information

Additional description

From OMIM
Epidermolysis bullosa simplex-7 with nephropathy and deafness (EBS7) is characterized by the presence of skin blistering at birth, particularly in the tibial area but also scattered on other parts of the body, particularly those exposed to trauma. Nephropathy manifests with proteinuria (summary by Has et al., 2020). For a discussion of genetic heterogeneity of the subtypes of EBS, see EBS1A (131760).  http://www.omim.org/entry/609057

Clinical features

From HPO
Thickened glomerular basement membrane
MedGen UID:
488906
Concept ID:
C0445347
Finding
Prominent glomerular basement membrane (GBM), reflecting an increase in thickness (subjective estimate) of the basal lamina of the glomerulus of the kidney.
Stage 5 chronic kidney disease
MedGen UID:
384526
Concept ID:
C2316810
Disease or Syndrome
A degree of kidney failure severe enough to require dialysis or kidney transplantation for survival characterized by a severe reduction in glomerular filtration rate (less than 15 ml/min/1.73 m2) and other manifestations including increased serum creatinine.
Glomerular basement membrane disruption
MedGen UID:
1785722
Concept ID:
C5539635
Anatomical Abnormality
A point of rupture in the glomerular basement membrane (GBM) where the discontinuous portions of GBM are still identifiable with a basement membrane stain such as Periodic acid Schiff (PAS) or silver.
Sensorineural hearing impairment
MedGen UID:
9164
Concept ID:
C0018784
Disease or Syndrome
A type of hearing impairment in one or both ears related to an abnormal functionality of the cochlear nerve.
Nephritis
MedGen UID:
14328
Concept ID:
C0027697
Disease or Syndrome
The presence of inflammation affecting the kidney.
Lacrimal duct stenosis
MedGen UID:
116054
Concept ID:
C0238300
Finding
Narrowing of a tear duct (lacrimal duct).
Nail dystrophy
MedGen UID:
66368
Concept ID:
C0221260
Disease or Syndrome
Onychodystrophy (nail dystrophy) refers to nail changes apart from changes of the color (nail dyschromia) and involves partial or complete disruption of the various keratinous layers of the nail plate.
Pretibial blistering
MedGen UID:
98154
Concept ID:
C0432321
Congenital Abnormality
Dystrophic epidermolysis bullosa (DEB) is a genetic skin disorder affecting skin and nails that usually presents at birth. DEB is divided into two major types depending on inheritance pattern: recessive dystrophic epidermolysis bullosa (RDEB) and dominant dystrophic epidermolysis bullosa (DDEB). Each type is further divided into multiple clinical subtypes. Absence of a known family history of DEB does not preclude the diagnosis. Clinical findings in severe generalized RDEB include skin fragility manifest by blistering with minimal trauma that heals with milia and scarring. Blistering and erosions affecting the whole body may be present in the neonatal period. Oral involvement may lead to mouth blistering, fusion of the tongue to the floor of the mouth, and progressive diminution of the size of the oral cavity. Esophageal erosions can lead to webs and strictures that can cause severe dysphagia. Consequently, malnutrition and vitamin and mineral deficiency may lead to growth restriction in young children. Corneal erosions can lead to scarring and loss of vision. Blistering of the hands and feet followed by scarring fuses the digits into "mitten" hands and feet, with contractures and pseudosyndactyly. The lifetime risk of aggressive squamous cell carcinoma is higher than 90%. In contrast, the blistering in the less severe forms of RDEB may be localized to hands, feet, knees, and elbows with or without involvement of flexural areas and the trunk, and without the mutilating scarring seen in severe generalized RDEB. In DDEB, blistering is often mild and limited to hands, feet, knees, and elbows, but nonetheless heals with scarring. Dystrophic nails, especially toenails, are common and may be the only manifestation of DDEB.

Term Hierarchy

CClinical test,  RResearch test,  OOMIM,  GGeneReviews,  VClinVar  
  • CROGVEpidermolysis bullosa simplex 7, with nephropathy and deafness
Follow this link to review classifications for Epidermolysis bullosa simplex 7, with nephropathy and deafness in Orphanet.

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