MC cancer due to Radiation :
**Core Concept**
Radiation-induced cancer, also known as radiation-induced malignancy, occurs when ionizing radiation damages the DNA of cells, leading to uncontrolled cell division and tumor formation. This phenomenon is a well-documented consequence of radiation exposure, particularly in the context of medical treatment, occupational exposure, and nuclear accidents.
**Why the Correct Answer is Right**
The correct answer is related to the mechanism of radiation-induced DNA damage. Ionizing radiation can cause direct DNA damage by breaking the phosphodiester backbone of DNA or forming free radicals that damage DNA indirectly. These DNA lesions can lead to genetic mutations, chromosomal instability, and ultimately, cancer development. The most commonly associated type of cancer with radiation exposure is thyroid cancer, followed by breast, lung, and leukemia.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not specify a type of cancer associated with radiation exposure.
**Option B:** This option is incorrect because it is a type of cancer that is associated with radiation exposure, but it is not the most commonly associated type.
**Option C:** This option is incorrect because it is not a type of cancer that is commonly associated with radiation exposure.
**Clinical Pearl / High-Yield Fact**
Radiation-induced cancer typically develops many years after exposure, often with a latency period of 5-20 years or more. This delayed onset is due to the gradual accumulation of DNA damage and mutations over time, highlighting the importance of radiation safety and monitoring in medical and occupational settings.
**Correct Answer:** C. Sarcoma