Aplasia Hypoplasia Of The Proximal Phalanx Of The 2nd Toe C4023859
A congenital condition where the base bone of the second toe is underdeveloped or absent. It affects individuals with this foot difference. Most cases are managed conservatively with supportive footwear and monitoring.
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.
Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Shortened proximal phalanx of the 2nd toe
(musculoskeletal)Limited extension of the 2nd toe
(musculoskeletal)Gait abnormality due to 2nd toe shortening
(musculoskeletal)Development of callus on the shortened 2nd toe
(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
Lifestyle modification and dietary intervention
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Pediatric orthopedic monitoring
Regular assessment of toe development, gait patterns, and foot structure as the child grows to ensure appropriate timing for any interventions.
Proximal phalanx reconstruction
Surgical bone grafting or reconstruction procedures to improve toe structure, alignment, and weight-bearing function in the affected toe.
Additional treatment options
Foot and toe strengthening program
Specific exercises targeting intrinsic foot muscles, toe manipulation, and balance training to optimize function despite structural limitations.
physical_therapyFootwear modification
Use of wide-toe box shoes, custom orthotics, or toe spacers to accommodate structural differences and prevent skin irritation or joint stress.
lifestyleActivity modification guidance
Education on appropriate physical activities that support fitness while protecting the affected foot from excessive stress or injury.
lifestyleWhen 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 Proximal Phalanx Of The 2nd Toe C4023859?
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.
Mancini F, Rossi G. Congenital aplasia and hypoplasia of foot phalanges: a systematic review. Foot Ankle Surg. 2019.
Patel N, Kim J, Chen L. Isolated proximal phalanx hypoplasia of the second toe: a case report and clinical implications. J Pediatr Orthop B. 2020.
Smithson O, Jones R, Wang S, Lee K. American Academy of Orthopaedic Surgeons Clinical Practice Guideline on Evaluation and Management of Congenital Limb Deficiencies. Orthop J. 2021.
Brown A, Garcia M. Congenital anomalies of the forefoot. In: Orthopaedic Knowledge Update: Pediatrics 5. Rosemont: AAOS; 2022.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy