This case represents a unique primary ovarian tumour consisting of malignant mucinous elements and granulosa-theca-cell elements, the histogenesis of which remains uncertain. It also underscores the need for thorough sampling of mucinous tumours in order to discover a possible coexisting, different neoplastic component.
To analyse and describe cases of unexpected ovarian malignancy after conservative laparoscopic surgery for an apparent benign ovarian mass at our centre.