Cancer, what are some signs for any kind of cancer?

Multiple : From skin to lung, to, GI tract. But weakness, pallor, weight loss, some with fever, and then local symptoms from the organ involved. Lung-cough blood rectum: bleeding.

Variable: A mass or lump. Difficulty swallowing. Change in bowel or bladder habits. Bloody stool or urine. Abnormal bleeding in a woman. Unexplained weight loss. Chest infection. Unexplained cough. Unexplained anemia. New onset of seizures. Personality change. New inversion of a nipple. Sudden accumulation of fluid in a body cavity. Change in a wart / mole. Sense of fullness in the abdomen.