Smoking-Related Cancers: Complete List with Risk Evidence

Smoking Causes Cancer—Throughout the Body

Tobacco smoke contains >7,000 chemicals, ≥70 known carcinogens. It's the **leading preventable cause of cancer** worldwide. Here are the sites with **sufficient evidence** (IARC Group 1):

Cancers Causally Linked to Smoking

Dose-Response & Quitting Benefits

Risk ↑ with pack-years, duration, depth of inhalation.
Quitting at any age reduces risk.
Lung cancer risk: ½ at 10 yrs quit; near never-smoker at 20–30 yrs.
Heart disease risk drops rapidly (1–2 yrs).

Emerging/Probable Links

Breast (postmenopausal), prostate (aggressive), skin (squamous), nasopharynx—evidence suggestive but not yet conclusive.

Beyond Cancer

Smoking also causes: COPD, heart disease, stroke, aortic aneurysm, PAD, diabetes, rheumatoid arthritis, macular degeneration, cataracts, erectile dysfunction, impaired healing, premature aging.

Action

FDA-approved cessation aids: varenicline, bupropion, NRT (patch/gum/lozenge/inhaler/nasal spray). Combination NRT + behavioral counseling = highest success. Call 1-800-QUIT-NOW.

Other Cancers - Related Articles

Cancer Site	Relative Risk (Current vs. Never)	Key Mechanism
Lung (bronchus, trachea)	15–30×	Direct carcinogen exposure; PAHs, NNK, benzene
Larynx	10–20×	Direct contact; squamous metaplasia → dysplasia
Oral Cavity & Pharynx	5–10×	Saliva dissolves carcinogens; alcohol synergy
Esophagus (squamous cell)	3–7×	Direct + systemic; alcohol synergy
Bladder	3–4×	Aromatic amines excreted in urine → urothelial contact
Pancreas	2–3×	Systemic carcinogens; nitrosamines
Kidney (renal cell)	1.5–2×	Carcinogen excretion; oxidative stress
Cervix	2–3× (with HPV)	Immunosuppression; HPV persistence; DNA adducts
Stomach (cardia)	1.5–2×	Swallowed carcinogens; H. pylori synergy
Liver	1.5–2×	Systemic; aflatoxin synergy
Colorectal	1.2–1.5×	Systemic; longer latency
Acute Myeloid Leukemia (AML)	1.5–2×	Benzene → bone marrow