The following is a list of ovarian epithelial cancer histologic classifications.

• Serous cystomas:
  • Serous benign cystadenomas.
  
  
  
  • Serous cystadenomas with proliferating activity of the epithelial cells and nuclear abnormalities but with no infiltrative destructive growth (low potential or borderline malignancy).
  
  
  
  • Serous cystadenocarcinomas.
  
  
  



• Mucinous cystomas:
  • Mucinous benign cystadenomas.
  
  
  
  • Mucinous cystadenomas with proliferating activity of the epithelial cells and nuclear abnormalities but with no infiltrative destructive growth (low potential or borderline malignancy).
  
  
  
  • Mucinous cystadenocarcinomas.
  
  
  



• Endometrioid tumors (similar to adenocarcinomas in the endometrium):
  • Endometrioid benign cysts.
  
  
  
  • Endometrioid tumors with proliferating activity of the epithelial cells and nuclear abnormalities but with no infiltrative destructive growth (low malignant potential or borderline malignancy).
  
  
  
  • Endometrioid adenocarcinomas.
  
  
  



• Clear cell (mesonephroid) tumors:
  • Benign clear cell tumors.
  
  
  
  • Clear cell tumors with proliferating activity of the epithelial cells and nuclear abnormalities but with no infiltrative destructive growth (low malignant potential or borderline malignancy).
  
  
  
  • Clear cell cystadenocarcinomas.
  
  
  



• Unclassified tumors that cannot be allotted to one of the above groups.



• No histology.



• Other malignant tumors (malignant tumors other than those of the common epithelial types are not to be included with the categories listed above).

(Refer to the PDQ summary on Ovarian Low Malignant Potential Tumor Treatment for more information.)

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