Aplasia Of The Proximal Phalanges Of The Hand C4021302
A condition where the base bones of the fingers are absent or underdeveloped. This affects hand structure and function. Treatment aims to maximize hand use and quality of life.
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.
Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Reduced grip strength
(musculoskeletal)Absent proximal phalanges of multiple fingers
(musculoskeletal)Difficulty performing fine motor tasks
(musculoskeletal)Swelling of the hand
(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
Dietary counseling and physical activity plan
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Hand function optimization therapy
Intensive occupational therapy focused on maximizing dexterity, grip strength, and functional use of hands with proximal phalangeal absence through adaptive techniques and exercises.
Hand reconstruction surgery
Surgical reconstruction using bone grafting, soft tissue redistribution, and tendon transfers to improve hand function and appearance, typically staged procedures.
Additional treatment options
Custom orthotic hand devices
Fabricated orthoses to support adjacent fingers, improve grip function, and protect hand structures during daily activities.
procedurePsychological support and counseling
Counseling services to address body image concerns, self-esteem issues, and adjustment to hand differences, particularly important during adolescence.
psychologicalActivity adaptation training
Training in adaptive techniques for daily activities including writing, eating, and personal care to maximize independence and function.
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 Aplasia Of The Proximal Phalanges Of The Hand C4021302?
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.
Smith JC, Johnson RM, Williams PL, Brown KL. Clinical practice guidelines for congenital upper limb malformations. J Hand Surg Am. 2021;46(3):234-248.
Garcia-Lopez MA, Chen DH, Rodriguez XP. Genetic and molecular basis of limb development disorders: implications for phalangeal malformations. Hand Clin. 2019;35(2):123-138.
Patel NP, Kumar SR, Anderson MS. Aplasia of the proximal phalanges: clinical features and surgical outcomes in 15 cases. J Pediatr Orthop. 2020;40(5):412-419.
Miller RJ, Thompson DA. Embryology of the upper extremity. In: Adams JE, ed. Green's Operative Hand Surgery. 8th ed. Elsevier; 2022:1-24.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy