What is the keys signs of prostate cancer?

Breast cancer usually spreads in the breast region and heads towards the lymph nodes. After that, the span of cancer increases and ultimately, it reaches the Metastasis stage, i.e. the spreading of cancerous cells to other areas.

Stage 4 bile duct cancer symptoms typically consist of white or pale stools, dark-coloured urine, jaundice, and abdominal pain. 

The likelihood of a cure at the 4th stage is low; however, it again depends on the person's will and treatment-responding ability to combat cancer.