Researchers from the University Hospital in Gothenburg, Sweden, have found that trained dogs could detect ovarian cancer's specific scent. However, it's not clear yet, whether they respond to the cancer itself or odors associated with it.

The researchers tried to investigate whether ovarian cancer scent differed from other cancers and whether working dogs could be taught to distinguish it in its different stages.

Mostly due to late diagnosis, ovarian cancer has a high mortality rate.

The researchers trained dogs to distinguish different types and grades of ovarian cancer, including borderline tumors. It was found that the odor of ovarian cancer did differ from those of other gynecological malignancies, including cervical and endometrial cancers, suggesting that a particular, distinguishable scent is associated with ovarian cancer.

They also found that early-stage and low grade ovarian cancers emit the same scent as advanced tumors.

Although researchers do not believe that dogs should be used in clinical practice, however, under controlled circumstances, they could be used in experiments to further explore this new property of malignancies.