What is cancer a risk factor for?

Cancer can lead to:: Abdominal abscess, Acanthosis nigricans, Acute Lymphoblastic Leukemia, Adrenal insufficiency, Anemia of chronic disease, Blood clot in leg, Blood clot in lung, Cardiac tamponade, Cavernous sinus thrombosis, Gangrene, Group B streptococcal infection, Liver abscess, Nocardiosis, Thrush, Pemphigus, Pleural effusion, Priapism, Sepsis, Superficial thrombophlebitis, Syndrome of inappropriate antidiuretic hormone, Thrombophilia, Urinary obstruction, Acute kidney failure, Chronic atrial fibrillation, Addison's disease, Embolus, Shingles, Encephalitis, Kidney failure, Atrial flutter, High risk pregnancy, Leukocytosis, Leukopenia, Low grade fever, Lactic acidosis, Phlebitis, Tuberculosis, Deep venous thrombosis, Metabolic acidosis, Systemic inflammatory response syndrome, Addisonian crisis.