Ovarian cancer is sometimes termed the silent killer because its symptoms are often associated with benign age-related ailments affecting the gastrointestinal (GI) tract, such as  irritable bowel syndrome, constipation and indigestion.
Late diagnosis is avoidable if patients understand the symptoms associated with ovarian cancer, and discuss persistent GI complaints with their doctor.

Sources:

• Hoffman, B L, et al. Williams Gynecology. 3rd ed., McGraw-Hill Education, 2016.