Malignant Struma


D efinition Malignant teratomatous thyroid tissue (carcinoma).

Clinical Features

Epidemiology

  • Association with mature cystic teratomas and struma ovarii. Mean age is approximately 43 years.

  • Approximately 5% of struma are malignant, at least focally. Some estimates are higher and this may depend on the stringency of the criteria for the diagnosis based on nuclear features.

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