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Related Experiment Videos

Struma ovarii: a case report.

J H Lazarus1, A R Richards, M J MacPherson

  • 1Department of Medicine, University of Wales College of Medicine, University Hospital of Wales, Cardiff, UK.

Clinical Endocrinology
|December 1, 1987
PubMed
Summary
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This case study details a patient with struma ovarii and hyperthyroidism, highlighting radioiodine profile scanning as a key diagnostic tool for this rare ovarian tumor causing thyrotoxicosis.

Area of Science:

  • Endocrinology
  • Gynecologic Oncology
  • Nuclear Medicine

Background:

  • Struma ovarii, a rare germ cell tumor containing thyroid tissue, can cause hyperthyroidism.
  • Graves' hyperthyroidism and subsequent hypothyroidism requiring thyroxine replacement are noted in the patient's history.
  • Recurrent thyrotoxicosis prompted further investigation after 20 years of management.

Observation:

  • Radioiodine profile scanning identified an ovarian tumor consistent with struma ovarii.
  • Surgical removal of the ovarian tumor confirmed its pathological features.
  • Autoradiography showed evidence of pre-administered 125I within the ovarian lesion.
  • The patient exhibited positive long-acting thyroid stimulator (LATS) and LATS-protector (LATS-P) results.
  • Bioassays for thyroid stimulators were positive post-operatively, contrasting with negative radioreceptor assays for TsAb.

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Findings:

  • Radioiodine profile scanning proved effective in diagnosing struma ovarii.
  • The interplay between circulating thyroid stimulators and the ovarian lesion remains unclear.
  • The presence of LATS and LATS-P suggests a complex autoimmune or stimulatory mechanism.

Implications:

  • This case underscores the importance of considering struma ovarii in patients with recurrent or unusual hyperthyroidism.
  • Radioiodine imaging may be a valuable diagnostic modality for suspected struma ovarii.
  • Further research is needed to elucidate the precise mechanisms driving thyroid stimulator activity in struma ovarii.