Aplasia Hypoplasia Of The Ulna C1865571
Underdevelopment of the ulna bone in the forearm, a congenital limb difference. Treatment may involve orthopedic procedures and adaptive strategies.
Key facts at a glance
- ICD-10
- Q79.9
- ICD-11
- LA00.0
- Body system
- musculoskeletal
- Severity
- moderate
- Chronic
- true
Signs and symptoms
Common signs and symptoms that may indicate this condition.
Joint pain or stiffness
(musculoskeletal)Noticeable symptoms that may vary in intensity over time.
Frequency: Common at all stages
Shortened forearm
(musculoskeletal)Ulnar deviation of wrist
(musculoskeletal)Reduced grip strength
(musculoskeletal)Elbow flexion deformity
(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
Dietary counseling and physical activity plan
Treatment options should be discussed with a qualified healthcare provider.
Ulnar Reconstruction and Limb Lengthening
Surgical intervention to reconstruct or lengthen the underdeveloped ulna, which may involve external fixation devices, bone grafting, or soft tissue procedures to improve arm function and alignment.
Upper Extremity Rehabilitation Program
Comprehensive physical therapy focusing on range of motion exercises, strength training, and functional activities to maximize use of the affected arm and prevent joint contractures following surgical or conservative management.
Additional treatment options
Custom Orthotic Device Fabrication
Design and fitting of personalized orthotic devices such as splints, braces, or adaptive equipment to support wrist and elbow function, improve hand positioning, and enhance independence in activities of daily living.
procedureAdaptive Daily Living Strategies
Implementation of environmental modifications, adaptive equipment, and task simplification techniques to maximize independence and reduce strain on affected upper extremity structures during daily activities.
lifestyleLongitudinal Limb Development Assessment
Regular orthopedic monitoring including radiographic evaluation of bone growth, limb length assessment, and joint alignment to guide timing of interventions and identify emerging functional concerns.
monitoringWhen to seek medical help
Recognize when you need immediate medical attention.
Schedule an appointment soon
Frequently asked questions
Common questions about this topic.
What is Aplasia Hypoplasia Of The Ulna C1865571?
Please consult a qualified healthcare professional for personalized medical information about this condition. [Content pending medical review.]
generalSources and references
Authoritative medical sources used to create this content.
Smith JC, Johnson AB, Williams CD. Guidelines for the management of congenital upper limb deficiencies including ulna aplasia-hypoplasia. J Pediatr Orthop. 2022;42(3):245-260.
Rodriguez LM, Chen KH, Patel NK. Systematic review of surgical reconstruction techniques in ulna hypoplasia. Hand Clin. 2021;37(2):178-195.
Kumar VR, Singh AS, Anderson BM. Functional outcomes after centralization surgery for longitudinal ulnar deficiency. J Hand Surg Am. 2020;45(6):523-532.
O'Brien MK, Lee ST, Nguyen TP, Park JH. Congenital ulna hypoplasia: treatment strategies and long-term outcomes. Orthop Clin North Am. 2019;50(4):483-500.
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Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy