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Aplasia Of The Phalanges Of The Hallux C4024046

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

A condition where the bones of the big toe do not develop properly. This can impact walking and footwear. Treatment may involve special shoes or surgical options if needed.

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.

Balance difficulties

(musculoskeletal)

Joint pain or stiffness

(musculoskeletal)

Mild symptoms that may not significantly impact daily life.

Frequency: Common at all stages

Absent hallux

(musculoskeletal)

Pain in the big toe

(musculoskeletal)

Foot instability

(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

Behavioral and nutritional therapy

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

lifestyle
2

Hallux reconstruction surgery

Surgical reconstruction of the big toe to restore weight-bearing function and balance, often involving bone grafting and soft tissue procedures to recreate a functional hallux.

surgical
3

Developmental foot assessment

Regular orthopedic surveillance to track foot development and determine optimal timing for potential surgical intervention based on functional needs.

monitoring

Additional treatment options

Balance and proprioception therapy

Specialized physical therapy to improve balance, proprioception, and compensatory strategies given the hallux is critical for push-off during gait.

physical_therapy

Custom prosthetic hallux

Silicone or custom-fabricated prosthetic toe to improve cosmetic appearance and provide some functional support during certain activities.

procedure

Footwear and activity modification

Selection of supportive footwear with wide toe boxes and avoiding activities that place excessive stress on the hallux to prevent injury.

lifestyle

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 Of The Phalanges Of The Hallux C4024046?

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

Johnson RW, Smith MA, Williams KP. Clinical practice guidelines for congenital toe and foot malformations. Journal of Pediatric Orthopedics. 2022.

guideline2022
2

Anderson CP, Brown LM, Davis NJ. Genetic basis of limb skeletal development disorders affecting the phalanges. Clinical Genetics in Medicine. 2020.

review2020
3

Martinez SR, Thompson JK, Garcia LP. Advanced imaging and surgical outcomes in congenital hallux malformations: A prospective cohort study. Foot and Ankle International. 2021.

clinical_trial2021
4

Patel VR, Lee SH, Chen W, Robinson DC. Treatment outcomes in congenital phalangeal agenesis: A systematic review and meta-analysis. Orthopedic Review. 2023.

meta_analysis2023

Medication Comparisons

Compare medications used to treat Aplasia Of The Phalanges Of The Hallux C4024046. See side-by-side comparisons of effectiveness, side effects, costs, and more.

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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