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Struma ovarii and hyperthyroidism.

T Dunzendorfer1, A deLas Morenas, T Kalir

  • 1Berkshire Physicians and Surgeons, Pittsfield, Massachusetts, 01201, USA. lisatom@bcn.net

Thyroid : Official Journal of the American Thyroid Association
|June 12, 1999
PubMed
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Struma ovarii, an ovarian teratoma with thyroid tissue, can cause hyperthyroidism. This case also involved a secreting pituitary tumor, a unique association, alongside a review of 1390 ovarian tumors.

Area of Science:

  • Gynecologic Oncology
  • Endocrinology
  • Pathology

Background:

  • Struma ovarii is a rare germ cell tumor composed primarily of thyroid tissue.
  • Ectopic thyroid tissue, like that found in struma ovarii, can exhibit autonomous function, leading to hyperthyroidism.
  • Ovarian teratomas are neoplasms that can differentiate into various tissue types.

Observation:

  • A case of hyperthyroidism caused by a large ovarian cystic teratoma with functioning thyroid tissue is presented.
  • This unique case is the first documented instance of struma ovarii associated with a secreting pituitary tumor.
  • Detailed endocrinological, radiological, and pathological data were collected pre- and post-operatively.

Findings:

  • The ovarian struma ovarii was confirmed as the source of hyperthyroidism.

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  • The co-occurrence with a pituitary adenoma secreting hormones was established.
  • Retrospective analysis of 1390 ovarian tumors provided pathological context.

    • Implications:

    • This case highlights the potential for ovarian teratomas to cause significant endocrine dysfunction.
    • The association with a pituitary tumor suggests complex hormonal interactions that warrant further investigation.
    • Understanding struma ovarii's endocrine activity is crucial for accurate diagnosis and management of ovarian neoplasms.