They account for ~ 10-15% of all ovarian mucinous tumours.
They are microscopically characterized by cytologic atypia and epithelial stratification, but stromal invasion is absent. They can show identical gross features to those of mucinous cystadenomas.
They are at least two recognised sub types
- intestinal type - commonest by far 3
- Mullerian (endocervical-like) type
They have a multilocular appearance at MR imaging and can be indistinguishable from of a simple mucinous cystadenoma of the ovary. Loculi are often small, arranged back-to-back, and variable in number. Contrast-enhanced images are essential to distinguish septal wall thickness from back-to-back small cysts.
They are non-invasive tumours, with survival rates reported as high as 99% 2.
- 1. diagnostic criteria, and behavior. Hum. Pathol. 2004;35 (8): 949-60. Hum. Pathol. (link) - Pubmed citation
- 2. 2. Imaoka I, Wada A, Kaji Y et-al. Developing an MR imaging strategy for diagnosis of ovarian masses. Radiographics. 26 (5): 1431-48. doi:10.1148/rg.265045206 - Pubmed citation
- 3. Hart WR. Mucinous tumors of the ovary: a review. Int. J. Gynecol. Pathol. 2005;24 (1): 4-25. Int. J. Gynecol. Pathol. (link) - Pubmed citation