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Brown tumor and secondary hyperparathyroidism.

M R Levine1, A Chu, F W Abdul-Karim

  • 1Division of Ophthalmology, Mt. Sinai Medical Center, Cleveland, Ohio.

Archives of Ophthalmology (Chicago, Ill. : 1960)
|June 1, 1991
PubMed
Summary

Brown tumors, a rare bone lesion in hyperparathyroidism, can affect the orbit. This case highlights orbital brown tumor in secondary hyperparathyroidism due to chronic renal failure.

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Area of Science:

  • Endocrinology
  • Oncology
  • Nephrology

Background:

  • Brown tumors are focal bone lesions resulting from hyperparathyroidism.
  • Elevated parathyroid hormone increases osteoclastic activity, leading to bone resorption and fibrosis.

Observation:

  • Brown tumors are most common in primary hyperparathyroidism and less frequent in secondary hyperparathyroidism.
  • Orbital involvement by brown tumors is exceptionally rare.

Findings:

  • This report details the sixth known case of an orbital brown tumor.
  • The patient presented with chronic renal failure, a cause of secondary hyperparathyroidism.

Implications:

  • This case underscores the importance of considering secondary hyperparathyroidism in orbital lesions.
  • Further research into the mechanisms and management of rare orbital brown tumors is warranted.

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