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Shoulder Osteonecrosis: Pathogenesis, Causes, Clinical Evaluation, Imaging, and Classification.

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Summary

Osteonecrosis of the humeral head, though less common than the femoral head, requires clinical suspicion due to various risk factors. Early detection of this condition is crucial for better prognosis.

Keywords:
Corticosteroids shoulder osteonecrosisDysbarism shoulder osteonecrosisHumeral head osteonecrosisPosttraumatic humeral head osteonecrosisSickle cell disease shoulder osteonecrosis

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Area of Science:

  • Orthopedics
  • Radiology
  • Pathology

Background:

  • Osteonecrosis commonly affects the femoral head, but the humeral head is the second most frequent site.
  • Nontraumatic osteonecrosis of the humeral head is often overlooked despite its association with conditions like corticosteroid use, sickle cell disease, and alcoholism.

Purpose of the Study:

  • To review osteonecrosis of the humeral head.
  • To emphasize its causes, clinical evaluation, imaging, and classification.

Main Methods:

  • Clinical assessment.
  • Radiographic imaging, including MRI, for diagnosis and staging.

Main Results:

  • Osteonecrosis of the humeral head is the second most common site for nontraumatic osteonecrosis.
  • Diagnosis relies on clinical and radiographic findings, with MRI being essential.
  • Prognosis is significantly influenced by the stage and location of the disease.

Conclusions:

  • A high index of suspicion is necessary for early detection of humeral head osteonecrosis.
  • Risk factors include fractures, steroid usage, sickle cell disease, and dysbarism.
  • Further research into the underlying mechanisms of osteonecrosis is warranted.