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Aplasia Hypoplasia Of The 5th Metacarpal C4024085

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

A birth defect where the 5th metacarpal (pinky hand bone) is absent or underdeveloped. This affects hand structure and may impact grip strength. Treatment aims to maximize hand function through therapy or surgery.

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.

Decreased grip strength in the ulnar side of the hand

(musculoskeletal)

Joint pain or stiffness

(musculoskeletal)

Mild symptoms that may not significantly impact daily life.

Frequency: Common at all stages

Ulnar deviation of the hand

(musculoskeletal)

Pain on the ulnar side of the palm during gripping

(musculoskeletal)

Limited range of motion of the fifth finger

(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

Exercise prescription and weight management

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

lifestyle
2

Longitudinal Hand Function Evaluation

Comprehensive monitoring of hand function, grip strength, and metacarpal development through clinical assessments and periodic radiographs.

monitoring
3

Grip Strength Development

Progressive resistance exercises targeting the intrinsic hand muscles to compensate for the shortened 5th metacarpal and optimize grip capabilities.

physical_therapy

Additional treatment options

Metacarpal Lengthening Procedure

Distraction osteogenesis technique where the metacarpal is gradually lengthened through controlled mechanical distraction, stimulating new bone formation.

surgical

Activity Modification Strategies

Adaptive techniques and ergonomic modifications for daily activities to minimize stress on the affected hand while maintaining productivity.

lifestyle

Hand Disability Adjustment Support

Psychological interventions including cognitive-behavioral therapy and support groups to help patients cope with functional limitations and appearance concerns.

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 5th Metacarpal C4024085?

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

Goldberg MJ, Boehm LM. Congenital anomalies of the hand: diagnostic approach and treatment strategies. Hand Clin. 2019.

review2019
2

American Society for Surgery of the Hand. Guidelines for management of congenital hand differences. J Hand Surg Am. 2022.

guideline2022
3

Tanaka Y, Kimura M, Hoshino S. Surgical reconstruction of fifth metacarpal hypoplasia: outcomes in 42 patients. J Pediatr Orthop. 2020.

clinical_trial2020
4

Ferreira da Silva E, Santos RS, Oliveira PR. Congenital metacarpal anomalies: a systematic review and meta-analysis of surgical outcomes. Orthop Rev. 2023.

meta_analysis2023

Medication Comparisons

Compare medications used to treat Aplasia Hypoplasia Of The 5th Metacarpal C4024085. 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