4 5 Finger Cutaneous Syndactyly C4023731
A condition where the skin between the ring and little fingers is webbed, present from birth. It may limit hand movement. Surgery to separate the fingers is often recommended to improve function.
Key facts at a glance
- ICD-10
- Q79.9
- ICD-11
- LA00.0
- Body system
- musculoskeletal
- Severity
- mild
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Secondary joint deformity
Development of joint contracture or abnormal finger positioning due to untreated syndactyly.
Urgent evaluation by a hand surgeon is recommended if joint deformity develops.
Functional disability
Severe limitation in hand function affecting daily activities when left untreated.
Seek immediate surgical consultation if functional disability impacts quality of life.
Webbed 4th and 5th fingers
(musculoskeletal)The ring and pinky fingers are connected by a web of skin, which may be partial or complete.
Frequency: 100% of patients
Reduced finger separation
(musculoskeletal)Inability to independently move the ring and pinky fingers due to skin connection.
Frequency: 100% of patients
Limited finger mobility
(musculoskeletal)Decreased range of motion in the affected fingers due to the cutaneous webbing.
Frequency: 70-80% of patients
Grip strength reduction
(musculoskeletal)Mild reduction in hand grip strength due to the fused fingers affecting normal hand mechanics.
Frequency: 50-60% of patients
Fine motor difficulty
(musculoskeletal)Challenges with tasks requiring fine finger movements such as buttoning, writing, or manipulating small objects.
Frequency: 50-70% of patients
Hand asymmetry
(musculoskeletal)Noticeable difference in appearance between the affected hand and the unaffected hand.
Frequency: 20-30% of patients
Skin irritation at webbed area
(dermatologic)Redness, irritation, or moisture buildup can occur in the skin fold between the connected fingers.
Frequency: 10-20% of patients
Progressive stiffness
(musculoskeletal)Increasing stiffness in the affected fingers over time if not treated surgically.
Frequency: 5-10% of patients
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy