One thing about cancer, no matter the type is that it suppresses appetite. Plus, in advanced stages of cervical cancer, the cervix can swell to press against the stomach, limiting the space available for food. All can result in extreme or sudden weight loss.
One of the risk factors for developing cervical cancer is diet. It is believed that a diet devoid of essential nutrients from vegetables and fruit may results in a higher risk of cervical cancer.
If you however, notice weight loss, please do see your doctor for medical examination.