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PubMed This is a summary of 18 peer-reviewed journal articles Updated
Pediatric Orthopedics · Radial Longitudinal Deficiency

Growing Up with RLD: Long-Term Outlook and Function

At a Glance

Children with Radial Longitudinal Deficiency (RLD) are highly resilient and adapt well to their limb differences. While their affected forearm will be shorter, most achieve independence in daily tasks, especially if they can pinch and grasp. Strong family support is key to their emotional health.

Looking toward the future, the most important thing to know is that children with radial longitudinal deficiency (RLD) are incredibly resilient and adaptable. While their arm and hand will look and function differently than a typical limb, the vast majority of these children lead full, active, and independent lives [1][2].

Functional Adaptation: The “New Normal”

Children with RLD do not “miss” having a typical radius; they grow up learning to use their bodies in creative and effective ways.

  • The Power of Pinch: The most critical factor for long-term independence is the ability to pinch and grasp [1]. If a pollicization (creating a thumb from the index finger) is performed, children typically gain the ability to write, use utensils, and perform fine-motor tasks [3][4].
  • Grip Strength: While grasp strength in a pollicized hand is generally lower than in a typical hand, it is almost always enough for daily activities (ADLs) [5].
  • The Straightness Trade-off: A perfectly “straight” wrist is not always the most functional [6]. In fact, many adults with RLD find that having some flexibility in the wrist—even if it is angled—is more useful than having a straight but fused or stiff wrist [7][6].

Growth and the “Short Forearm”

Parents should prepare for the fact that the forearm will be significantly shorter than the unaffected side by the time the child reaches adulthood [8].

  • The Ulna: In RLD, even the ulna (the pinky-side bone) is often shorter and more curved than usual [9].
  • Growth Plates: Surgical procedures to straighten the wrist can sometimes unintentionally slow down the growth of the ulna further [7][10].
  • Shoulder and Neck: Because the forearm is shorter, children may compensate by moving their shoulder or neck more often. Long-term follow-up is important to prevent muscle strain or pain in these areas as they reach adulthood [11].

Psychosocial Health and Resilience

The emotional journey is just as important as the physical one. Research shows that children with congenital limb differences often have positive emotional states and strong peer relationships that are comparable to their peers [2][12].

  • Self-Esteem: A child’s self-esteem is more influenced by their family’s support and their own sense of capability than by the “severity” of their limb difference [13].
  • The School Years: Adolescence can be a challenging time for body image. Children with visible differences may face questions or bullying [14]. Equipping your child with a “script” to explain their hand and building a community with other families of children with limb differences can provide a powerful buffer against these challenges [15][16].
  • Mental Health: While most children thrive, specialized support from a pediatric psychologist can be helpful during major transitions, such as starting a new school or considering “maintenance” surgeries in the teenage years [17][18].

Final Thoughts

Your child’s potential is not defined by the length of their radius. With a supportive team and the right interventions, children with RLD can grow up to be whatever they want to be—doctors, artists, engineers, or athletes. Their “different” hand is not a barrier, but a unique part of how they navigate and master their world.

Common questions in this guide

Will my child with RLD be able to perform daily activities independently?
Yes, the vast majority of children with RLD lead full, independent lives. By adapting and utilizing techniques like the pinch grasp or undergoing a pollicization procedure, they typically gain the ability to write, use utensils, and perform fine-motor tasks.
Why is a perfectly straight wrist not always the best goal for RLD?
A perfectly straight wrist often requires surgical fusion, which can result in stiffness. Many adults with RLD find that having some flexibility in an angled wrist is far more functional for daily tasks than a straight but stiff wrist.
Will my child's forearm be shorter if they have RLD?
Yes, you should expect your child's affected forearm to be significantly shorter than the unaffected side by adulthood. This is because the ulna bone is often shorter and more curved, and certain wrist surgeries can further slow its growth.
Will my child experience muscle pain from having a shorter arm?
Because the forearm is shorter, children with RLD may compensate by moving their shoulder or neck more frequently. Long-term follow-up is important to monitor for and prevent secondary muscle strain or pain in these areas as they reach adulthood.
How can I support my child's mental health as they grow up with a visible limb difference?
A child's self-esteem is heavily influenced by family support and their own sense of capability. Equipping your child with a simple explanation to share with curious peers and connecting with other limb difference families can greatly boost their confidence.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.How will the shortening of the ulna affect my child's ability to drive or perform specific tasks as an adult?
  2. 2.If we prioritize wrist mobility over a perfectly straight appearance, what will my child's long-term range of motion look like?
  3. 3.As my child grows, how will you monitor for secondary musculoskeletal pain in their shoulder or neck from overcompensating?
  4. 4.What kind of occupational therapy will my child need during their school years to keep up with handwriting or typing?
  5. 5.Do you have resources or referrals for child psychologists who specialize in limb differences to help us navigate the social transitions of middle and high school?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (18)
  1. 1

    Functional Evaluation of Pollicization in Young Children with Radial Longitudinal Deficiency: Beneficial Results Despite the Presence of Finger Anomalies.

    Mehta R, Sripathy AK, Thatte MR

    Indian journal of orthopaedics 2026; (60(4)):886-892 doi:10.1007/s43465-025-01639-4.

    PMID: 42027321
  2. 2

    Congenital Upper-Limb Differences: A 6-Year Literature Review.

    Shah A, Bohn DC, Van Heest AE, Hu CH

    The Journal of bone and joint surgery. American volume 2023; (105(19)):1537-1549 doi:10.2106/JBJS.22.01323.

    PMID: 37624908
  3. 3

    Pollicization of index Fingers For Bilateral Hypoplastic Thumbs of Twin Babies: Case Series At Cure Children's Hospital of Ethiopia.

    Mohammed T, Jimma TM, Zerfu TT, Kassaahun ME

    International medical case reports journal 2024; (17()):327-333 doi:10.2147/IMCRJ.S454360.

    PMID: 38623353
  4. 4

    Clinical and functional results of radial club hand with centralization and pollicization using the second metacarpus: A clinical case series.

    Lahiji FA, Asgari F, Mirzaee F, et al.

    International journal of surgery case reports 2019; (61()):285-290 doi:10.1016/j.ijscr.2019.07.076.

    PMID: 31401436
  5. 5

    The Effects of Radial Longitudinal Deficiency on Long-Term Use of the Thumb in Pediatric Patients Following Index Pollicization.

    Pino PA, Sarcon AK, Wan R, et al.

    The Journal of hand surgery 2025; (50(6)):751.e1-751.e9 doi:10.1016/j.jhsa.2024.02.010.

    PMID: 38583165
  6. 6

    Challenging the dogma: a straight wrist should be the goal in radial dysplasia.

    Ezaki M

    The Journal of hand surgery, European volume 2021; (46(1)):14-20 doi:10.1177/1753193420961008.

    PMID: 32990151
  7. 7

    Outcomes of early treatment of radial dysplasia.

    Nguyen PD, Light TR, Mai TT

    Journal of clinical orthopaedics and trauma 2024; (50()):102357 doi:10.1016/j.jcot.2024.102357.

    PMID: 38370427
  8. 8

    Outcomes of radialization with ulnar cuff osteotomy for radial longitudinal deficiency: a medium-term follow-up study.

    Bhat AK, G MP, Acharya AM

    The Journal of hand surgery, European volume 2023; (48(11)):1168-1176 doi:10.1177/17531934231185024.

    PMID: 37401123
  9. 9

    Association of Radial Longitudinal Deficiency and Thumb Hypoplasia: An Update Using the CoULD Registry.

    Forman M, Canizares MF, Bohn D, et al.

    The Journal of bone and joint surgery. American volume 2020; (102(20)):1815-1822 doi:10.2106/JBJS.20.00281.

    PMID: 33086350
  10. 10

    Management of a severe radial longitudinal deficiency using a magnetically controlled growing rod.

    Le Hanneur M, Langlais T, Fitoussi F

    The Journal of hand surgery, European volume 2022; (47(5)):527-529 doi:10.1177/17531934211051289.

    PMID: 34633884
  11. 11

    Musculoskeletal Complaints in Transverse Upper Limb Reduction Deficiency and Amputation in The Netherlands: Prevalence, Predictors, and Effect on Health.

    Postema SG, Bongers RM, Brouwers MA, et al.

    Archives of physical medicine and rehabilitation 2016; (97(7)):1137-45.

    PMID: 26906238
  12. 12

    Functional Impact of Congenital Hand Differences: Early Results From the Congenital Upper Limb Differences (CoULD) Registry.

    Bae DS, Canizares MF, Miller PE, et al.

    The Journal of hand surgery 2018; (43(4)):321-330 doi:10.1016/j.jhsa.2017.10.006.

    PMID: 29241842
  13. 13

    Association between bullying victimization and depressive symptoms in children: The mediating role of self-esteem.

    Zhong M, Huang X, Huebner ES, Tian L

    Journal of affective disorders 2021; (294()):322-328 doi:10.1016/j.jad.2021.07.016.

    PMID: 34311332
  14. 14

    Peer Victimization in Preadolescent Children With ADHD in Turkey.

    Örengül AC, Goker H, Zorlu A, et al.

    Journal of interpersonal violence 2021; (36(11-12)):NP6624-NP6642 doi:10.1177/0886260518816321.

    PMID: 30520679
  15. 15

    Exploring the impact of peer victimization on self-esteem in adolescents with type 1 diabetes: the power of psychological resilience.

    Simsek A, Ali MMM, Er S, Kose S

    European journal of pediatrics 2025; (184(6)):376 doi:10.1007/s00431-025-06203-8.

    PMID: 40447901
  16. 16

    Congenital limb deficiency disorders.

    Wilcox WR, Coulter CP, Schmitz ML

    Clinics in perinatology 2015; (42(2)):281-300, viii.

    PMID: 26042905
  17. 17

    Establishing the psychological impact of congenital upper limb differences on parents and families.

    Miller R, Mackenzie A, Welman T, et al.

    The Journal of hand surgery, European volume 2025; (50(2)):247-252 doi:10.1177/17531934241256793.

    PMID: 38833552
  18. 18

    Mental health and psychosocial support for children with upper limb musculoskeletal conditions.

    Persaud D, Hutchison T, Anthony SJ, et al.

    The Journal of hand surgery, European volume 2024; (49(7)):885-891 doi:10.1177/17531934231214138.

    PMID: 37987683

This page provides educational information about the long-term outlook for children with RLD. Always consult your pediatric orthopedist or care team regarding your child's specific prognosis and developmental needs.

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