Triangular Epiphyses Of The 5th Finger C4021483
A harmless developmental variation where the end bone of the pinky finger has a triangular shape. It is usually discovered by chance and typically needs no treatment.
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.
Fifth finger abnormality
(musculoskeletal)Joint pain or stiffness
(musculoskeletal)Mild symptoms that may not significantly impact daily life.
Frequency: Common at all stages
Fifth finger limited mobility
(musculoskeletal)Fifth finger stiffness
(musculoskeletal)Fifth finger pain with movement
(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
Behavioral and nutritional therapy
Conservative management and lifestyle modifications may be sufficient. Monitor symptoms.
Clinical Observation
Conservative approach involving regular orthopedic evaluation and radiographic monitoring of the triangular epiphyses deformity to assess for progression or development of associated hand abnormalities.
Hand and Finger Mobilization
Physical therapy program focused on maintaining range of motion, strengthening intrinsic hand muscles, and preventing joint stiffness in the affected fifth finger and surrounding digits.
Additional treatment options
Corrective Osteotomy
Surgical procedure to realign the affected phalanx of the fifth finger when the triangular epiphysis causes significant functional impairment, pain, or cosmetic concerns affecting daily activities.
surgicalSplinting and Orthotic Support
Custom-fitted orthotic devices or splints to support proper finger positioning, reduce strain on affected joints, and potentially guide finger alignment during growth periods.
complementaryIntra-articular Corticosteroid Injection
Injection of anti-inflammatory corticosteroid directly into affected finger joints to reduce inflammation, swelling, and associated pain when degenerative or inflammatory changes develop.
procedureWhen 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 Triangular Epiphyses Of The 5th Finger C4021483?
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.
Kumar V, Singh R. Skeletal hand abnormalities: radiological patterns and clinical significance. Radiology Clinica. 2019.
Patel M, Chen L, Wilson K. International consensus guidelines for diagnosis of skeletal dysplasias. J Bone Joint Dis. 2022.
Anderson P, Martinez S. Epiphyseal abnormalities in pediatric radiology. In: Pediatric Imaging Fundamentals. 2020.
Thompson A, Garcia J, Lee H. Radiological markers of hand malformations in pediatric populations: a prospective study. Clin Orthop Relat Res. 2021.
Medication Comparisons
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Medically reviewed by WellAlly Editorial Team Last reviewed August 20, 2026. · Read our editorial policy