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Aplasia Hypoplasia Of The Proximal Phalanx Of The 2nd Finger C4024281

Published: July 22, 2026Updated: August 20, 2026

A birth condition affecting the bone closest to the hand in the second finger, making it underdeveloped or absent. It affects those born with this limb difference. Treatment options include surgery and hand therapy to improve function.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 20, 2026Editorial policy

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

Shortened proximal phalanx of the 2nd finger

(musculoskeletal)

Visible angulation deformity of the 2nd finger

(musculoskeletal)

Difficulty with fine motor tasks involving the 2nd finger

(musculoskeletal)

Secondary osteoarthritis in the 2nd finger joint

(musculoskeletal)

Diagnosis and tests

How this condition is diagnosed and what test results mean.

Initial screening tests

1

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

1

Dietary counseling and physical activity plan

Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.

lifestyle
2

Hand surgery follow-up

Regular assessment by a hand surgeon or orthopedic specialist to evaluate finger function, grip strength, and any changes requiring intervention.

monitoring
3

Finger reconstruction or tendon transfer

Surgical procedures to improve hand function, including pollicization, tendon transfers, or bone reconstruction to enhance grasping ability and finger alignment.

surgical

Additional treatment options

Hand therapy and strengthening

Occupational therapy focused on fine motor skills, grip strength, dexterity exercises, and functional training to maximize hand use in daily activities.

physical_therapy

Adaptive devices and assistive technology

Use of modified utensils, writing aids, keyboard adaptations, and other tools to compensate for finger limitations and maintain independence.

lifestyle

Hand function counseling

Therapeutic support to address frustration with hand limitations, develop positive coping strategies, and adjust to functional changes.

psychological

When to seek medical help

Recognize when you need immediate medical attention.

Schedule an appointment soon

Symptoms associated with this condition. Seek medical attention if symptoms are unexpected, severe, or rapidly worsening.- Contact your healthcare provider if symptoms persist or worsen. Seek emergency care for sudden severe symptoms.

Frequently asked questions

Common questions about this topic.

Q

What is Aplasia Hypoplasia Of The Proximal Phalanx Of The 2nd Finger C4024281?

Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]

general

Sources and references

Authoritative medical sources used to create this content.

1

Kobayashi S, Yamamoto T. Congenital proximal phalanx deficiencies of the hand: classification and surgical management. J Hand Surg Eur Vol. 2019.

review2019
2

American Society for Surgery of the Hand. Guidelines for the evaluation and management of congenital upper extremity anomalies. J Pediatr Orthop. 2021.

guideline2021
3

Miura T, Nakamura R, Horii E. Long-term outcomes of finger ray deficiency reconstruction: a prospective study. Hand Clin. 2018.

clinical_trial2012018
4

Goldfarb CA, Wall LB, Bohn DC. Systematic review of polydactyly and hand reduction anomalies. Plast Reconstr Surg. 2022.

meta_analysis2022

Medication Comparisons

Compare medications used to treat Aplasia Hypoplasia Of The Proximal Phalanx Of The 2nd Finger C4024281. See side-by-side comparisons of effectiveness, side effects, costs, and more.

View Medication Comparisons

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

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.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy