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Developmental humerus varus

J A Ogden, U H Weil, R F Hempton

    Clinical Orthopaedics and Related Research
    |May 1, 1976
    PubMed
    Summary
    This summary is machine-generated.

    Humerus varus, a proximal humeral deformity, results from various disorders affecting bone growth. Despite potential shortening and reduced abduction, significant functional impairment is uncommon, even in the dominant arm.

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    Area of Science:

    • Orthopedics
    • Pediatric Orthopedics
    • Genetics

    Background:

    • Humerus varus is the upper extremity equivalent of coxa vara.
    • It is associated with various systemic conditions including hematologic, infectious, metabolic, genetic, and neurologic disorders.
    • The deformity follows a consistent developmental pattern regardless of etiology.

    Purpose of the Study:

    • To describe the developmental pattern and progression of humerus varus.
    • To correlate the radiographic findings with clinical outcomes.
    • To understand the underlying pathophysiology of proximal humeral physeal involvement.

    Main Methods:

    • Review of radiographic findings in patients with humerus varus.
    • Correlation of imaging features with underlying etiologies.

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  • Assessment of functional outcomes and range of motion.

    • Main Results:

    • A characteristic pattern of proximal humeral physeal development is observed, with medial underdevelopment and lateral overgrowth.
    • Radiographic signs include varus rotation, medial lucency, bony epiphyseodesis, and humerus shortening.
    • Decreased shoulder abduction is common, but major functional limitations are rare.

    Conclusions:

    • Humerus varus exhibits a predictable developmental progression driven by asymmetric physeal growth.
    • The condition, while causing structural changes, typically does not lead to severe functional deficits.
    • Early recognition and understanding of the deformity's progression are crucial for patient management.