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Any autosomal dominant cutis laxa in which the cause of the disease is a mutation in the FBLN5 gene.
Features include: Premature skin wrinkling, Sideways curvature of the spine (scoliosis), Mitral regurgitation, and Cutis laxa.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Skin | 1 | Premature skin wrinkling |
Bones and joints | 1 | Sideways curvature of the spine (scoliosis) |
Heart and blood vessels | 1 | Mitral regurgitation |
To date, six families with autosomal recessive FBLN5-related cutis laxa have been described [, , , , , , ]. Intrafamilial variability in age of onset is observed. Cutis laxa. The most common finding in FBLN5-related cutis laxa is described as furrowing of the skin of the whole body that is particularly obvious in the neck, axillae, and groin. The face has a "droopy" appearance with eyelid ptosis and drooping cheeks. When one tries to extend the skin, it does not display hyperelasticity as in the Ehlers-Danlos syndromes, but rather keeps its consistency. Pulmonary emphysema. Most affected individuals have early childhood-onset pulmonary emphysema, and some individuals have presented with emphysema during the neonatal period.
Source: GeneReviews — "FBLN5-Related Cutis Laxa"
FBLN5 encodes fibulin 5 (448 aa). Essential for elastic fiber formation, is involved in the assembly of continuous elastin (ELN) polymer and promotes the interaction of microfibrils and ELN. Highest expression in Artery Aorta (795.1 TPM) and Cells Cultured fibroblasts (292.3 TPM).
Cutis laxa, autosomal dominant 2 is associated with mutations in the FBLN5 gene on chromosome 14.
The FBLN5 protein participates in Tropoelastin associates with microfibrils pathway.
FBLN5 is classified as a druggable target (Druggable Genome category) with score 0.0.
FBLN5-related cutis laxa should be suspected in individuals with the following clinical features:
Cutis laxa
Pulmonary emphysema
Arterial involvement (e.g., peripheral pulmonary artery stenosis, supravalvar aortic stenosis)
Inguinal hernias
Hollow viscus diverticula (e.g., intestine, bladder)
Pyloric stenosis
The diagnosis of FBLN5-related cutis laxa is established in a proband with the above and biallelic pathogenic (or likely pathogenic) variants in FBLN5 (autosomal recessive FBLN5-related cutis laxa) or a heterozygous pathogenic (or likely pathogenic) variant in FBLN5 (autosomal dominant FBLN5-related cutis laxa) identified by molecular genetic testing .
Source: GeneReviews — "FBLN5-Related Cutis Laxa"
Other disorders characterized by cutis laxa are summarized in . EFEMP2-related cutis laxa (ARCL1B). EFEMP2-related cutis laxa is characterized by cutis laxa and systemic involvement, most commonly arterial tortuosity, aneurysms, and stenosis; retrognathia; joint laxity; and arachnodactyly. Severity ranges from perinatal lethality as a result of cardiopulmonary failure to manifestations limited to the vascular and craniofacial systems. The cutis laxa and emphysema are similar in FBLN4- or FBLN5-related cutis laxa; however, to date, the diaphragmatic changes and arterial aneurysms seem more predominant in EFEMP2-related cutis laxa. ATP6V0A2-related cutis laxa (ARCL2A) spans a phenotypic spectrum that includes Debr-type cutis laxa at the severe end and wrinkly skin syndrome at the mild end.
Source: GeneReviews — "FBLN5-Related Cutis Laxa"
Genetic testing for FBLN5 is available. Testing is considered confirmatory for diagnosis.
No approved treatments are currently available for cutis laxa, autosomal dominant 2. The disease remains an area of unmet medical need.
Evaluations Following Initial Diagnosis To establish the extent of disease and needs in an individual diagnosed with FBLN5-related cutis laxa, the evaluations summarized (if not performed as part of the evaluation that led to the diagnosis) are recommended. Table 3. Recommended Evaluations Following Initial Diagnosis in Individuals with FBLN5-Related Cutis Laxa
System/Concern | Evaluation | Comment |
|---|---|---|
Cardiovascular | Echocardiogram | Consider pulmonary vessel angiogram if clinically indicated. |
Renal | Kidney ultrasound exam | Consider voiding cystoureterogram, given potential presence of urethral diverticula; catheterization should be done carefully. IV pyelogram may be an alternative. |
Gastrointestinal | Exam for inguinal hernia | Barium enema if clinically indicated |
Other | Consultation w/clinical geneticist /or genetic counselor | IV = intravenous Treatment of Manifestations Table 4. Treatment of Manifestations in Individuals with FBLN5-Related Cutis Laxa Manifestation/Concern |
Source: GeneReviews — "FBLN5-Related Cutis Laxa"
View trials for cutis laxa, autosomal dominant 2
Routine surveillance of the urinary tract for evidence of bladder diverticula and/or vesicoureteral reflux is indicated.
Source: GeneReviews — "FBLN5-Related Cutis Laxa"
No clinical trials have been registered for cutis laxa, autosomal dominant 2.
9 publications have been identified in PubMed for cutis laxa, autosomal dominant 2. Research spans Case Report / Case Series (78%), Review / Meta-Analysis (11%), and Basic Science / Preclinical (11%).
Xiang S (2026). [PMID: 42232968](https://pubmed.ncbi.nlm.nih.gov/42232968/). *Front Med (Lausanne)*. [Case Report / Case Series]
Almheiri S (2026). [PMID: 41676178](https://pubmed.ncbi.nlm.nih.gov/41676178/). *AME case reports*. [Case Report / Case Series]
Karabatic A (2025). [PMID: 41224373](https://pubmed.ncbi.nlm.nih.gov/41224373/). *European respiratory review : an official journal of the European Respiratory Society*. [Review / Meta-Analysis]
Wu X (2025). [PMID: 40170866](https://pubmed.ncbi.nlm.nih.gov/40170866/). *Frontiers in immunology*. [Case Report / Case Series]
Ganjibakhsh M (2025). [PMID: 40158781](https://pubmed.ncbi.nlm.nih.gov/40158781/). *Matrix biology : journal of the International Society for Matrix Biology*. [Case Report / Case Series]
Furuta Y (2025). [PMID: 40062121](https://pubmed.ncbi.nlm.nih.gov/40062121/). *Cureus*. [Case Report / Case Series]
Georgeos MKH (2024). [PMID: 39544917](https://pubmed.ncbi.nlm.nih.gov/39544917/). *F1000Research*. [Case Report / Case Series]
Kaji M (2024). [PMID: 39354494](https://pubmed.ncbi.nlm.nih.gov/39354494/). *BMC pulmonary medicine*. [Case Report / Case Series]
Stanworth M (2024). [PMID: 39480826](https://pubmed.ncbi.nlm.nih.gov/39480826/). *PloS one*. [Basic Science / Preclinical]
Data assembled from 6 of 12 sources · Last updated Sep 19, 2026, 6:46 AM UTC
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