Cenani-Lenz Syndactyly Syndrome

Cenani-Lenz Syndactyly Syndrome is a rare genetic condition that affects how fingers and toes develop before birth. The condition causes complete or partial fusion of the fingers and toes, a characteristic known as syndactyly. This fusion occurs when the tissue between digits does not separate properly during fetal development.

The syndrome is caused by mutations in the LRP4 gene, which provides instructions for making a protein involved in limb development. Children inherit this condition in an autosomal recessive pattern, meaning they must receive one altered gene copy from each parent. The condition is present from birth and varies in severity from person to person.

Beyond the fusion of fingers and toes, some people with this condition may also experience other skeletal differences in their hands and feet. The severity of webbing or fusion can range from mild skin webbing to complete bone fusion of multiple digits. Early diagnosis helps families plan for potential surgical interventions and supportive care.

• Complete or partial fusion of fingers, often affecting multiple digits
• Fusion of toes, which may involve skin webbing or bone connection
• Shortened or absent finger and toe bones
• Limited movement or flexibility in affected digits
• Abnormal positioning or curvature of fused fingers or toes
• Nail abnormalities on affected digits
• Difficulty grasping objects or performing fine motor tasks
• Challenges with walking or balance due to toe fusion

This condition is typically visible at birth, so most cases are identified immediately by healthcare providers during newborn examination. The severity of symptoms depends on how many digits are affected and the extent of fusion.

Cenani-Lenz Syndactyly Syndrome is caused by mutations in the LRP4 gene, which plays a critical role in limb development during pregnancy. This gene helps regulate signaling pathways that control how fingers and toes separate and form. When mutations occur in both copies of the LRP4 gene, the normal separation process is disrupted, leading to syndactyly.

The condition follows an autosomal recessive inheritance pattern, meaning both parents must carry one copy of the mutated gene to pass it to their child. Parents who are carriers typically do not show symptoms themselves. The risk is higher in families with a history of the condition or in communities where consanguineous marriages are more common. Each pregnancy between two carrier parents has a 25% chance of producing a child with the syndrome.

Cenani-Lenz Syndactyly Syndrome is usually diagnosed at birth based on the visible physical characteristics of fused fingers or toes. A pediatrician or geneticist will conduct a thorough physical examination and may order X-rays to assess the extent of bone fusion and skeletal structure. Imaging helps doctors understand whether the fusion involves just skin and soft tissue or also includes bones.

Genetic testing is the definitive way to confirm the diagnosis and identify LRP4 gene mutations. Blood tests can detect LRP4 antibodies, which may indicate abnormal protein function and prompt further genetic evaluation. While Rite Aid offers screening for certain biomarkers, specialized genetic testing for rare conditions like this typically requires referral to a genetics specialist. Talk to our doctor about testing options and next steps for your family.

• Surgical separation of fused fingers or toes, typically performed in early childhood to improve function
• Physical therapy to improve strength, flexibility, and range of motion after surgery
• Occupational therapy to develop fine motor skills and adapt to hand differences
• Custom orthotics or adaptive devices to support mobility and daily activities
• Pain management strategies if needed during recovery or growth periods
• Regular follow-up with orthopedic surgeons and genetic specialists
• Psychological support for children and families adjusting to physical differences
• Genetic counseling for families planning future pregnancies