Abnormal Finger Phalanx Morphology C4021614
An abnormal shape or structure of the finger bones present from birth. This may occur alone or with other conditions. Treatment depends on the underlying cause and may include monitoring or surgical correction.
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
Severe finger deformity
Significant morphological abnormalities causing major aesthetic concerns or substantial functional impairment of the hand.
Seek immediate medical care if severe finger deformity causes sudden pain, numbness, or loss of finger function.
Short fingers
(musculoskeletal)One or more fingers appear shorter than normal due to shortened phalanges, a characteristic feature of abnormal finger phalanx development.
Frequency: 80-90% of patients
Inward curved fingers
(musculoskeletal)Permanent inward curvature of the fingers, most commonly affecting the fifth finger (pinky), known as clinodactyly.
Frequency: 70-80% of patients
Fused finger joints
(musculoskeletal)Abnormal fusion of finger joints (symphalangism) that reduces flexibility and range of motion in the affected fingers.
Frequency: 40-50% of patients
Broad fingertips
(musculoskeletal)Unusually wide or rounded ends of the fingers due to abnormal phalanx width and soft tissue development.
Frequency: 35-45% of patients
Nail abnormalities
(dermatologic)Changes in nail shape, size, or texture including ridged, brittle, or misshapen nails on affected fingers.
Frequency: 30-40% of patients
Limited finger mobility
(musculoskeletal)Reduced range of motion in finger joints due to abnormal phalanx structure or joint fusion.
Frequency: 30-40% of patients
Finger pain
(musculoskeletal)Discomfort or pain in the fingers, particularly when using hands for fine motor activities or gripping objects.
Frequency: 15-20% of patients
Extra fingers
(musculoskeletal)Presence of additional fingers (polydactyly) beyond the normal five, often associated with certain genetic phalanx abnormalities.
Frequency: 5-10% of patients
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy