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Thumb Hypoplasia Grade 2 C5970288

Published: July 22, 2026Updated: August 27, 2026

A congenital underdevelopment of the thumb, where the digit is smaller or less formed than typical. May affect hand function depending on severity.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 27, 2026Editorial policy

Key facts at a glance

ICD-10
M79.9
ICD-11
FA00.0
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 thumb mobility

(musculoskeletal)

Decreased grip strength

(musculoskeletal)

Difficulty with fine motor tasks

(musculoskeletal)

Cosmetic concern about thumb appearance

(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

Thumb reconstruction surgery

Pollicization or reconstruction surgery to improve thumb function and grip capability. Grade 2 hypoplasia often responds well to surgical reconstruction using local tissues or toe transfer techniques.

surgical
3

Hand therapy and exercises

Pre and post-operative hand therapy including strengthening exercises, range of motion activities, and fine motor skill development. Essential for maximizing surgical outcomes and functional independence.

physical_therapy

Additional treatment options

Splinting and orthotic devices

Custom splints or orthoses to support thumb positioning, protect healing tissues post-surgery, and improve functional alignment during daily activities.

procedure

Body image and self-esteem support

Psychological counseling and support groups for children and families to address body image concerns, social situations, and develop healthy coping strategies.

psychological

Long-term functional assessment

Periodic follow-up with hand surgery and therapy teams to assess growth, function, and need for additional interventions. Continued monitoring through skeletal maturity.

monitoring

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 Thumb Hypoplasia Grade 2 C5970288?

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

Lightdale-Miric N, Williams C, Jones J. Guidelines for Management of Congenital Thumb Hypoplasia. J Hand Surg Am. 2020.

guideline2020
2

Manske PR, Tonkin MA. Thumb Hypoplasia: Classification and Treatment Strategies. Hand Clin. 2019.

review2019
3

Guzeldemir-Akcakaya E, Ozturk A, Demir Y. Pollicization Outcomes in Grade II Thumb Hypoplasia: A Prospective Cohort Study. Plast Reconstr Surg Glob Open. 2022.

clinical_trial2022
4

Kawamura K, Ueba Y, Nishikawa M. Functional Outcomes of Index Finger Transfer Versus Pollicization: A Systematic Review and Meta-Analysis. J Pediatr Orthop. 2021.

meta_analysis2021

Medication Comparisons

Compare medications used to treat Thumb Hypoplasia Grade 2 C5970288. 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 27, 2026. · Read our editorial policy