Ovary tumor
Mucinous tumors
Benign mucinous tumors

Authors: Shahrzad Ehdaivand, M.D. (see Authors page)

Revised: 20 May 2016, last major update July 2012

Copyright: (c) 2003-2016, PathologyOutlines.com, Inc.

PubMed Search: benign mucinous tumor
Cite this page: Benign mucinous tumors. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/ovarytumormucinousbenign.html. Accessed December 3rd, 2016.
Definition / General
  • Includes cystadenoma, cystadenofibroma and adenofibroma (rare)
  • Lesions are a spectrum of benign lesions with varying amounts of cysts, glands, and stroma - the distinction is arbitrary
  • 5% bilateral
  • Associations: carcinoid tumors in same ovary, dermoid cyst, Brenner tumor, endocervical adenocarcinoma; rarely with Zollinger-Ellison syndrome
Case Reports
Gross Description
  • Smooth surface with multiple cystic spaces, variable amounts of solid areas
  • Unilocular cysts are almost always benign
  • Filled with translucent viscous fluid
Gross Images

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Mucinous cystadenoma

Associated with dermoid cyst

Micro Description
  • Tall, columnar, nonciliated cells, basal nuclei, abundant intracellular mucin
  • Usually endocervical type; also intestinal type (picket fence architecture with Paneth cells) or mixed
  • Stroma may be fibrous or mimic ovarian stroma
  • Tumor may be hypercellular or luteinized, often with calcifications
  • May have microscopic rupture of cysts with inflammatory reaction including histocytes and necrosis
  • Small bland papillae may be present, and mild, focal cytologic atypia may be present
  • Adenofibroma: may have crowded glands with atypia (Am J Surg Pathol 1991;15:227)
Micro Images

Images hosted on PathOut server:

Surface epithelial inclusion cyst

Mucinous adenofibroma

Mucinous cystic tumor

With luteinization of stroma resulting in virilization during pregnancy



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Mucinous cystadenoma

Positive Stains
Differential Diagnosis