Aplasia Of The Distal Phalanx Of The 2nd Finger C4021439
A condition where the fingertip bone of the index finger fails to develop from birth. It may occur on its own or as part of a genetic syndrome. Treatment considers function and appearance when needed.
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.
Absence of the distal phalanx of the index finger
(musculoskeletal)Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Reduced dexterity of the index finger
(musculoskeletal)Localized pain at the site of aplasia
(musculoskeletal)Secondary bony overgrowth at the residual digit
(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
Distal phalanx reconstruction
Surgical reconstruction of the fingertip using local flaps, graft techniques, or toe pulp transplantation to restore appearance and sensation. The goal is to provide padding, nail support, and tactile function.
Healthy lifestyle changes and stress management
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Sensory re-education therapy
Specialized therapy to improve sensation, coordination, and fine motor control of the index finger following reconstruction or as compensatory training. Includes desensitization exercises and functional activities.
Additional treatment options
Nail reconstruction procedure
Cosmetic and functional nail reconstruction to improve appearance and provide protection for the fingertip. May involve artificial nail techniques or surgical nail bed reconstruction.
procedureProtective silicone cap device
Custom silicone fingertip protectors that shield the sensitive tip during daily activities while allowing continued hand use. These devices provide cushioning and reduce injury risk.
complementaryFingertip development surveillance
Ongoing monitoring of fingertip growth, sensation development, and functional outcomes through childhood. Coordinates care between hand surgeons, therapists, and primary care providers.
monitoringWhen 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 Aplasia Of The Distal Phalanx Of The 2nd Finger C4021439?
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.
Tonkin MA, Tolerton SK, Barker TH. Congenital hand malformations: Classification and clinical features. J Hand Surg Eur Vol. 2019.
American Society for Surgery of the Hand. Guidelines for management of congenital upper extremity anomalies. J Hand Surg. 2021.
Kato H, Ogino T, Minami A. Clinical study of distal phalanx aplasia: A retrospective analysis. Handchir Mikrochir Plast Chir. 2018.
Bae DS, Waters PM, eds. Pediatric Hand and Upper Extremity Surgery. 2nd ed. Lippincott Williams & Wilkins; 2022.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy