That would be an oncologist. There are other specialists as well that can deal with tumors such as a urologist who deals with the prostate.
A lump of cancerous tissue is typically referred to as a tumor. Tumors can be either benign or malignant. Benign tumors are non-cancerous growths that do not invade nearby tissues or spread to other parts of the body. Malignant tumors, on the other hand, are cancerous growths that have the potential to invade surrounding tissues and metastasize, or spread, to other parts of the body.
The specialist that deals with feet is called a podiatrist. He/she concentrates on the diagnosis and treatment of disorders of the foot, ankle, and lower leg.
Cancerous growths have been with us since before man walked upright. It has been a disease known to man long before records were kept of such things. Not always called cancer but known by different names such as carcinos in 460BC. Prior to that it was just wasting or growths. Mummified remains from 3000 BC have shown cancerous growths on bone.
A hematologist is a medical specialist who diagnoses and treats disorders of the blood. The hematologist also cares for blood-forming organs.
Polyps. These are usually benign growths but can sometimes develop into cancer if left untreated. Regular colonoscopies are recommended to detect and remove any polyps before they become cancerous.
A non-cancerous abnormal cell is called a benign cell. Benign cells can form growths or tumors that do not invade surrounding tissues or spread to other parts of the body, unlike malignant (cancerous) cells. While benign tumors can still cause health issues depending on their size and location, they are generally considered less harmful than cancerous tumors.
The small benign growths that protrude from the mucous membrane of the large bowel are called polyps. Polyps are common in the colon and are usually non-cancerous, but they can potentially develop into colorectal cancer if not removed. Regular screening is recommended to detect and remove polyps early.
A dermatologist diagnoses and cares for people with skin disorders.
benign
Carcinogens
The natural phenomenon that allows for the growths on trees to occur is called photosynthesis.
A flag specialist is called a vexillologist.