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Neoplasms in Struma Ovarii: A Review.

Isabella Tondi Resta1, Christopher M Sande2, Virginia A LiVolsi3

  • 1Department of Pathology and Laboratory Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA, 19104, USA. isabella.tondiresta@pennmedicine.upenn.edu.

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This summary is machine-generated.

Struma ovarii, an ovarian teratoma of thyroid tissue, can rarely harbor malignancy. This review aids pathologists in diagnosing malignant struma ovarii using key markers like TTF1.

Keywords:
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Area of Science:

  • Gynecologic Pathology
  • Endocrine Pathology
  • Oncologic Pathology

Background:

  • Struma ovarii is a germ cell tumor composed of mature thyroid tissue, typically benign.
  • While predominantly benign, struma ovarii can rarely present with malignant transformation.
  • Accurate diagnosis is crucial for appropriate patient management and prognosis.

Purpose of the Study:

  • To review common malignancies associated with struma ovarii.
  • To highlight the diagnostic utility of specific immunohistochemical markers.
  • To aid pathologists in the accurate diagnosis of malignant struma ovarii.

Main Methods:

  • Review of literature on struma ovarii and its malignant counterparts.
  • Discussion of key histopathological features of common struma ovarii malignancies.
  • Emphasis on immunohistochemical staining, particularly TTF1, PAX8, and thyroglobulin.

Main Results:

  • Common malignant components include papillary thyroid carcinoma, strumal carcinoid, and follicular thyroid carcinoma.
  • Immunohistochemistry, especially TTF1, is vital for distinguishing thyroid tissue from ovarian epithelium.
  • Normal thyroid tissue in struma ovarii shows characteristic staining for TTF1, PAX8, and thyroglobulin.

Conclusions:

  • Malignant transformation in struma ovarii requires careful histopathological evaluation.
  • TTF1 staining is a critical tool for differentiating struma ovarii malignancies from ovarian neoplasms.
  • This review provides a concise guide for pathologists managing complex struma ovarii cases.