Ovary tumor
Mucinous tumors
Mucinous borderline tumors, endocervical type

Topic Completed: 1 July 2012

Revised: 15 December 2019

PubMed Search: Ovarian mucinous borderline endocervical

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Cite this page: Ehdaivand, S. Mucinous borderline tumors, endocervical type. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/ovarytumorborderlinemucinousendocervical.html. Accessed February 18th, 2020.
Definition / general
  • 15% of borderline mucinous tumors
  • Tumors usually mixed, but clinically resemble serous tumors due to papillary architecture, serous-type differentiation, frequent bilaterality, smaller size, indolent clinical behavior (only rare deaths, Am J Surg Pathol 2002;26:1529)
  • Mean 39 years (younger patients), range 25-64 years
  • Associated with endometriosis in 41% of cases, endosalpingiosis in 32%
  • Malignancy is based on cytology, not number of cell layers
  • Almost always stage I, excellent prognosis with no evidence of disease at followup, even with intraepithelial carcinoma, microinvasion (Am J Surg Pathol 2004;28:1311), or extraovarian involvement (implants and lymph node involvement)
Microscopic (histologic) description
  • Proliferation of branching papillary structures resembling borderline serous tumors
  • Papillae composed of fibrovascular cores of variable size covered by variable epithelium including mucinous or eosinophilic cells
  • Mucinous cells have basal nuclei
  • Some papillary tips lack fibrovascular cores
  • Small detached clusters of cells may be observed over the papillary tufts
  • Hobnail cells also present
  • Rare intraepithelial carcinoma or stromal microinvasion, but no stromal invasion
  • Associated with invasive or noninvasive desmoplastic implants
Microscopic (histologic) images

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Mucinous cystic tumor

Mixed epithelial types

Omental implant

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