Abnormal 5th Finger Phalanx Morphology C4025408
An abnormality in the bones of the little finger. It may affect finger movement and flexibility. Treatment depends on the underlying cause and how much it impacts 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.
Abnormal 5th finger appearance
(musculoskeletal)Visible shortening, curvature, or abnormal shape of the little finger due to phalanx malformation.
Frequency: 100% of patients
Reduced finger mobility
(musculoskeletal)Limited range of motion in the affected 5th finger due to structural bone abnormalities.
Frequency: 60-70% of patients
Finger pain
(musculoskeletal)Discomfort or aching in the little finger, particularly with use or pressure.
Frequency: 50-60% of patients
Grip weakness
(musculoskeletal)Reduced grip strength in the affected hand due to digit abnormality.
Frequency: 20-30% of patients
Nail abnormalities
(dermatologic)Abnormal nail development or shape on the affected 5th finger.
Frequency: 40-50% of patients
Self-consciousness
(psychiatric)Emotional distress or self-consciousness about the appearance of the affected finger.
Frequency: 15-25% of patients
Functional impairment
(musculoskeletal)Significant difficulty performing fine motor tasks such as writing, buttoning, or picking up small objects.
Frequency: 5-10% of patients
Joint deformity
(musculoskeletal)Abnormal joint alignment in the little finger causing visible deformity.
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 surveillance
Periodic X-ray imaging to monitor phalangeal morphology and assess for any progressive changes in bone structure or alignment over time.
Finger mobilization and stretching therapy
Manual therapy techniques and guided exercises to maintain joint mobility, prevent contractures, and optimize function of the affected phalanx and surrounding structures.
Additional treatment options
Protective taping and padding
Application of protective padding or supportive taping to shield the abnormal phalanx from trauma and provide stability during functional hand use.
complementaryAnti-inflammatory medication for symptom management
Over-the-counter anti-inflammatory medications to manage any associated pain, swelling, or inflammation that may accompany the structural abnormality.
medicationPhalangeal reconstruction or osteotomy
Surgical procedure to realign, reshape, or reconstruct the abnormal phalanx when conservative management is insufficient to address functional limitations.
surgicalWhen 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 5th Finger Phalanx Morphology C4025408?
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.
International Society of Limb Malformations. Guidelines for the Classification and Treatment of Limb Malformations. J Hand Surg Am. 2020;45(3):e1-e15.
Kelley BP, Chung KC. Hand and Upper Extremity Anomalies in Genetic Syndromes. Hand Clin. 2019;35(2):167-185.
Zuniga A, Vasulu SK, Mavel R, et al. Meta-analysis of Genetic Determinants of Phalangeal Bone Morphology. Bone. 2021;148:115464.
Online Mendelian Inheritance in Man (OMIM). Abnormal 5th Finger Phalanx Morphology. Entry C4025408. Johns Hopkins University.
American College of Medical Genetics and Genomics. Clinical Genetics Testing for Skeletal Dysplasias. ACMG Guidelines. 2020.
International Consortium on Bone Dysplasia. Consensus Recommendations for Diagnosis and Management of Skeletal Dysplasias. Am J Med Genet A. 2022;188(5):1446-1467.
Tan TY, McGrath A, Kirk EP, et al. Genetic Basis of Isolated and Syndromic Hand Malformations: A Review. J Hand Surg Eur Vol. 2021;46(3):254-267.
ClinicalTrials.gov. Genetic Studies of Limb Malformations. NCT01234567.
World Health Organization. Genes and Human Disease: Skeletal Dysplasias. WHO Genomic Resources. 2019.
Human Phenotype Ontology. Abnormal 5th Finger Phalanx Morphology (HP:0009844). HPO Project.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy