Question

Lung cancer is a
(a) Carcinoma
(b) Sarcoma
(c) Malignant lymphoma
(d) Leukemia

Answer 1

Cancer is of two types- malignant and benign. A benign tumor does not spread in the body whereas a malignant tumor spreads in the body from the point of their origin. Carcinoma develops in epithelial cells, Sarcoma arises from connective tissues, Malignant lymphoma arises from the lymph system and Leukemia arises from the blood.

Complete step by step answer:
Lung cancer is a carcinoma. Carcinoma arises in epithelial tissue that is found in the internal and external lining of the body. Carcinoma arises from cells originating in the germ layers during embryogenesis. It occurs when DNA is damaged or some mutation occurs that causes the cells to grow uncontrollably and exhibit metastasis (the stage when cancer starts spreading in the body- the most feared property of cancer).
So, the correct answer is Carcinoma.

Additional information:
- Carcinoma develops from epithelial cells. Carcinoma begins in a tissue that lines the inner and outer surfaces of the body and from the germ layers during embryogenesis.
- Carcinoma word is derived from the word karkinos meaning crab.
- Squamous cell carcinomas develop in the squamous epithelium of organs like the skin, bladder, esophagus, and lung.
- Adenocarcinomas develop in organs on glands like the prostate, breast, liver.
Sarcoma: Sarcoma arises from connective tissue that is found in bones, tendons, ligaments, cartilage, muscle fats.
Malignant lymphoma: Lymphoma itself is derived from the word lymph meaning it is cancer that arises from the lymph system.
Leukemia: Leukemia arises from blood-forming tissues. It includes cancer of the bone marrow also.
- All kinds of cancer share a similar property of uncontrolled division of cells and cancerous cells lose contact inhibition.

Note: Cancer is basically divided into four types- carcinoma, sarcoma, malignant lymphoma, and leukemia. Cancer may be malignant or benign depending on when it is treated if it is treated early metastasis can be controlled and thus malignant tumors can be controlled.