RESUMO
Struma ovarii are specialized teratomas consisting of thyroid tissue with various microscopic features, ranging from benign to malignant. We report a rare form of malignant struma ovarii, composed exclusively of a follicular variant of papillary thyroid carcinoma with capsular invasion, which occurred in a 65-yr-old woman.
Assuntos
Neoplasias Ovarianas/patologia , Estruma Ovariano/patologia , Idoso , Feminino , Humanos , Microvilosidades/ultraestrutura , Metástase Neoplásica , Neoplasias Primárias Múltiplas/patologia , Neoplasias Ovarianas/ultraestrutura , Estruma Ovariano/ultraestruturaRESUMO
This study was prompted by the recent revision of the definition of bronchioloalveolar carcinoma (BAC) that defines BAC, light microscopically, as a non-invasive carcinoma. Doubt has been raised whether BACs retain certain specific microscopic features after becoming invasive or metastatic. We studied 7 cases of metastatic, non-mucinous BAC by electron microscopy. Of these cases, 5 showed Clara cell granules and 1 revealed lamellar bodies. The remaining case did not show ultrastructural features of BAC. These findings suggest that most BACs retain some of their ultrastructural features after becoming metastatic neoplasms.