Understanding Tumors

Normally cells divide only when additional cells are required for normal body function. However, at certain times the controls that regulate when a cell divides are lost. This results in accumulation of more and more cells without order. Eventually these cells grow into a mass and this is termed a 'tumor'. It is important to understand that not all tumors are cancer.

normal ovary

Types of Ovarian Cancer

There are three main types of ovarian tumors:

  • Epithelial tumors- derived from the cells on the surface of the ovary. This is the most common form of ovarian cancer and occurs primarily in adults.
  • Germ cell tumors- derived from the egg producing cells within the body of the ovary. This occurs primarily in children and teens and is rare by comparison to epithelial ovarian tumors.
  • Stromal tumors - rare in comparison to epithelial tumors and this class of tumors often produces steroid hormones.

Under the Microscope

Epithelial Ovarian Tumors   

High-Grade Serous Carcinoma Epithelial Ovarian Tumor
Ovarian Endometrioid Carcinoma Epithelial Tumor
Clear Cell Carcinoma Epithelial Tumor
Mucinous Carcinoma Epithelial Tumor
Low-Grade Serous Carcinoma Epithelial Tumor

Germ Cell Ovarian Tumors   

Dysgerminoma Germ Cell Ovarian Tumor
Yolk Sac Germ Cell Ovarian Tumor

Sex Cord Stromal Ovarian Tumors   

Adult Granulosa Cell Ovarian Tumor
Sertoli-Leydig Cell Ovarian Tumor