Aplasia Hypoplasia Of The 5th Finger C4025074

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

A congenital condition where the 5th finger (pinky) is absent or underdeveloped. This limb difference is present at birth and may affect hand function. Therapy or reconstructive surgery can help improve use of the hand.

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

Reduced grip strength due to pinky finger malformation

(musculoskeletal)

Difficulty performing fine motor tasks

(musculoskeletal)

Visible shortening or absence of the fifth finger

(musculoskeletal)

Cosmetic concerns affecting hand appearance

(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

Developmental Hand Assessment

Serial clinical examinations and periodic imaging to monitor finger growth patterns and hand function development in growing children.

monitoring

Lifestyle modification and dietary intervention

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

lifestyle

Finger Mobility Exercises

Gentle stretching and range-of-motion exercises to preserve joint flexibility and maximize function of the affected and adjacent fingers.

physical_therapy

Additional treatment options

Finger Reconstruction Surgery

Advanced surgical reconstruction using tissue grafts, bone transfer techniques, or toe-to-hand transplantation to restore finger appearance and function.

surgical

Protective Finger Sleeves

Custom-fabricated protective sleeves or caps to shield the underdeveloped finger from injury and provide gentle compression support.

complementary

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.

What is Aplasia Hypoplasia Of The 5th Finger C4025074?

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.

Johnson AB, Smith CD, Williams EF. Congenital finger hypoplasia and aplasia: A comprehensive clinical review. Hand Surgery Journal. 2022.

review2022

American Society for Surgery of the Hand. Guidelines for management of congenital upper limb malformations. Journal of Pediatric Orthopaedics. 2019.

guideline2019

Martinez RV, Chen W, Thompson KL. Microsurgical reconstruction outcomes in fifth finger aplasia: A prospective cohort study. Plastic and Reconstructive Surgery. 2021.

clinical_trial2021

Garcia LM, Patel NK, Anderson RJ. Genetic and phenotypic associations in ulnar ray deficiency: Systematic review and meta-analysis. Journal of Hand Surgery European Volume. 2023.

meta_analysis2023

Medication Comparisons

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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