Müllerian Mucinous and Seromucinous Tumors of the Ovary


D efinition —A morphologic spectrum of tumors arising in endometriosis and displaying a müllerian (rather than intestinal) phenotype.

Clinical Features

Epidemiology

  • Rare, reports limited to small series.

  • Associated with borderline neoplasia usually serous or mucinous.

  • Most present in the fourth and fifth decades.

  • Considered a derivation of endometrioid differentiation (endometriotic cysts).

Presentation

  • Unilateral or bilateral.

  • Parvilocular or multilocular. The appearance is often that of an endometrioid cyst with foci of excrescences.

  • Frequently bilateral, likely because of the association with endometriosis.

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