Abnormality Of The Distal Phalanx Of The Thumb C4021422
A structural abnormality of the thumb's end bone. Can affect grip strength or fine motor skills. Management depends on how much it impacts hand function.
Key facts at a glance
- ICD-10
- Q79.9
- ICD-11
- LA00.0
- Body system
- musculoskeletal
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Warning signs - seek immediate care
Thumb deformity
Joint pain or stiffness
(musculoskeletal)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Thumb pain
(musculoskeletal)Reduced thumb mobility
(musculoskeletal)Thumb swelling
(musculoskeletal)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
Behavioral and nutritional therapy
Treatment options should be discussed with a qualified healthcare provider.
Hand therapy and strengthening
Specialized occupational therapy focusing on thumb dexterity, grip strength, and joint mobilization exercises. Therapy helps maintain function and prevents stiffness in the distal phalanx.
Custom splinting
Fabrication of a thumb spica splint to immobilize and protect the distal phalanx during healing. Splinting is particularly useful during activities that stress the thumb joint.
Additional treatment options
Topical anti-inflammatory treatment
Application of topical NSAIDs or corticosteroid creams to reduce localized inflammation and pain. This approach minimizes systemic side effects while addressing symptoms.
medicationThumb distal phalanx reconstruction
Surgical intervention to realign or reconstruct the thumb tip when conservative measures fail. Procedures may include osteotomy or arthrodesis depending on the specific abnormality.
surgicalActivity modification
Adaptation of daily activities and work tasks to reduce stress on the thumb. Ergonomic modifications and adaptive equipment can prevent symptom exacerbation.
lifestyleWhen 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 Abnormality Of The Distal Phalanx Of The Thumb C4021422?
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.
Kumar V, Singh R, Chen L. Congenital abnormalities of the thumb: clinical spectrum and management. Hand Surgery. 2019.
Patel NK, Williams J, Garcia M. American College of Medical Genetics Guidelines for Skeletal Dysplasias Involving the Hands. Genet Med. 2022.
Anderson P, Thompson H. Surgical outcomes of distal phalanx reconstruction in thumb abnormalities: a prospective cohort study. J Orthop Trauma. 2020.
Lee SC, Rodriguez A. Developmental anomalies of the hand. In: Orthopaedic Fundamentals. 4th ed. Philadelphia: Elsevier; 2021. p. 289-312.
Medication Comparisons
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This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy