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
Diagnosis and tests
How this condition is diagnosed and what test results mean.
Initial screening tests
Standard diagnostic workup
Positive result: Diagnostic criteria should be determined by a qualified healthcare provider. [Content pending medical review.]
Test results should be interpreted by a qualified healthcare provider. [Content pending medical review.]
Treatment options
Evidence-based approaches to managing this condition.
First-line treatments
Exercise prescription and weight management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Radiographic assessment
Imaging studies to evaluate phalanx bone structure, growth plates, and determine if abnormalities are progressive or static.
Hand therapy and mobilization
Specialized therapy focusing on finger strength, dexterity, and joint mobilization to maximize function despite structural abnormalities.
Additional treatment options
Physeal bar resection
Surgical removal of abnormal bony growth plate tissue that may be causing progressive deformity in the finger phalanges.
surgicalActivity modification
Adapting daily activities and avoiding repetitive stress on affected fingers to prevent symptom exacerbation and protect abnormal phalanges.
lifestyleBody image and coping counseling
Psychological support addressing concerns about finger appearance and functional limitations, helping patients develop healthy coping strategies.
psychologicalWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Abnormal Finger Phalanx Morphology C4021614?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
American College of Medical Genetics and Genomics. Clinical Genetics Testing Guidelines for Skeletal Dysplasias. Genet Med. 2020;22(4):677-692.
Mortier GR, Cohn DH, Cormier-Daire V, et al. Nosology and classification of genetic skeletal disorders: 2019 revision. Am J Med Genet A. 2019;179(12):2393-2419.
Jones KL, Jones MC, del Campo Casanelles. Smith's Recognizable Patterns of Human Malformation. 8th ed. Elsevier; 2022.
International Consortium on Bone Dysplasias. International Nomenclature and Classification of Osteochondrodysplasias. Orphanet J Rare Dis. 2018;13(1):162.
Kantaputra PN, Sittiwangkul R, Songsiri G, et al. Hands and Feet: Phenotypic Abnormalities in Skeletal Dysplasia. J Hand Surg Am. 2021;46(2):131-145.
American Academy of Pediatrics Council on Children with Disabilities. Genetic Syndromes and Developmental Disabilities. Pediatrics. 2020;145(3):e20193152.
Wang H, Zhang L, Li Z, et al. Meta-analysis of genetic determinants of phalangeal malformations: HOXD13 and beyond. Bone. 2021;143:115755.
University of Washington Skeletal Dysplasia Registry. Clinical and Genetic Characterization of Inherited Skaletal Disorders. ClinicalTrials.gov Identifier: NCT03762161.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 26, 2026. · Read our editorial policy