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A rare, inherited, popliteal pterygium syndrome characterized by severe popliteal webbing, microcephaly, a typical face with short palpebral fissures, ankyloblepharon, hypoplastic nose, filiform bands between the jaws and facial clefts, oligosyndactyly, genital abnormalities, and additional ectodermal anomalies (i.e. absent hair, eyebrows, lashes, nails). It is often fatal in the neonatal period, but patients living until childhood have been reported.
Data assembled from 6 of 12 sources · Last updated Sep 20, 2026, 4:43 AM UTC
Online Mendelian Inheritance in Man
European rare disease database
Genetic and Rare Diseases Info Center
Common questions about Bartsocas-Papas syndrome 1
Features include always present findings: Opacification of the corneal stroma, Anal atresia, Flexion contracture, and Skin tags and others; and very common findings: Ankyloblepharon. 68 total HPO annotations.
Organ System | Phenotype Count | Example Features |
|---|---|---|
Skin | 5 | Skin tags, Dry skin, Alopecia totalis |
Head and neck | 4 | Cleft palate, Hypoplasia of the maxilla, Cleft upper lip |
Eyes | 2 | Opacification of the corneal stroma, Corneal ulceration |
Muscles | 2 | Flexion contracture, Joint stiffness present at birth (arthrogryposis multiplex congenita) |
Arms and legs | 2 | Short phalanx of finger, Limb undergrowth |
Kidneys and urinary system | 1 | Ectopic kidney |
Pregnancy and birth | 1 | Decreased fetal movement |
Growth and development | 1 | Intrauterine growth retardation |
RIPK4 function has not been fully characterized.
Bartsocas-Papas syndrome 1 is associated with mutations in the RIPK4 gene on chromosome 21.
Genetic testing for RIPK4 is available. Testing is considered confirmatory for diagnosis.
Phenotype severity distribution: 38 always present features, 1 very common feature, 17 common features.
Estimated prevalence: <1 in 1,000,000 (VERY_RARE).
No clinical trials have been registered for Bartsocas-Papas syndrome 1.
5 publications have been identified in PubMed for Bartsocas-Papas syndrome 1. Research spans Basic Science / Preclinical (60%), Review / Meta-Analysis (20%), and Case Report / Case Series (20%).
Ding P (2025). [PMID: 40683865](https://pubmed.ncbi.nlm.nih.gov/40683865/). *Nature communications*. [Basic Science / Preclinical]
Lu YL (2025). [PMID: 39833848](https://pubmed.ncbi.nlm.nih.gov/39833848/). *Italian journal of pediatrics*. [Case Report / Case Series]
Yu F (2025). [PMID: 41002404](https://pubmed.ncbi.nlm.nih.gov/41002404/). *Cells*. [Review / Meta-Analysis]
Zhang J (2024). [PMID: 39316049](https://pubmed.ncbi.nlm.nih.gov/39316049/). *Proceedings of the National Academy of Sciences of the United States of America*. [Basic Science / Preclinical]
Xu L (2024). [PMID: 38630705](https://pubmed.ncbi.nlm.nih.gov/38630705/). *PloS one*. [Basic Science / Preclinical]
AI-curated news mentioning Bartsocas-Papas syndrome 1
Updated Jul 21, 2026
FDA approved Casgevy CRISPR gene therapy for children as young as 2 with sickle cell disease on July 1, 2026. Here's what families need to know about this milestone. Approximately 5,500 additional American children are now eligible for this established one-time therapy, according to Vertex Pharmaceuticals, Casgevy's developer. Casgevy also covers transfusion-dependent beta-thalassemia in this new age indication. Sickle cell disease is a lifelong inherited blood disorder that warps red blood cells into stiff, crescent shapes that can block blood flow, starving organs and tissues of oxygen. The world's first CRISPR-based gene therapy has been approved for children as young as two years old, opening the possibility of a single, potentially curative treatment to thousands of American children with sickle cell disease before years of organ damage can narrow what medicine can do for them. Families with children aged 2 and older who have sickle cell disease should speak with their pediatric hematologist about whether Casgevy is appropriate to consider at this stage of their child's disease. Ask specifically which authorized treatment centers perform Casgevy in your region. Treatment is available only at specialized sites, and geographic access remains limited. Contact your child's insurance plan or Medicaid office to ask about coverage. Medicaid coverage for gene therapies varies by state, and some states have developed outcomes-based payment models for high-cost therapies. "With today's decision, pediatric patients as young as 2 years of age can now access a critical additional treatment option to treat these debilitating, life-threatening diseases," said Karim Mikhail, acting director of the Office of Therapeutic Products at the FDA's Center for Biologics Evaluation and Research, according to the FDA press announcement. Casgevy is a non-viral, ex vivo CRISPR/Cas9 gene-edited cell therapy.
A new treatment for children aged 2 or older with sickle cell disease has been approved by the U.S. Food & Drug Administration. In a press release on Wednesday, the FDA announced it had approved Casgevy, the first gene therapy for children with sickle cell disease. (NewsNation) — A new treatment for children aged 2 or older with sickle cell disease has been approved by the Food & Drug Administration (FDA). In a Wednesday news release, the FDA announced it had approved Casgevy, the first gene therapy for children with the disease. “Casgevy is a gene therapy consisting of the patient’s own (autologous) hematopoietic (blood) stem cells, administered as a one-time single dose for intravenous infusion,” the release noted. “Pediatric patients as young as 2 years of age can now access a critical additional treatment option to treat these debilitating, life-threatening diseases,” Karim Mikhail, the acting director of the Center for Biologics Evaluation and Research, wrote. “These disorders carry a heavy burden for children and their families, affecting growth, development, and long-term health in profound ways,” Megha Kaushal, acting deputy director of the Office of Therapeutic Products in CBER, said in the release.