Which portion of the tumor is the most radiosensitive?


Which tumor is highly radiosensitive?

Among these tumors, undifferen- tiated carcinoma and small cell carcinoma have relatively high radiosensitivity, followed by squa- mous cell carcinoma.

What is the radiosensitive tumor?

Radiosensitive tumours are tumours which respond well to radiotherapy. Radiotherapy may be effective alone, or may require the addition of cytotoxic chemotherapy as in the more advanced stages of a Wilm’s tumour and Hodgkin’s disease. This group includes: malignant lymphomas.

What body part is most sensitive to radiation?

Radiation in high doses can be dangerous no matter what, but some parts of the body are more sensitive than others. The most sensitive parts of the human body are the lymphoid organs, bone marrow, blood, testes, ovaries and intestines, according to the Collaboration for Nondestructive Testing[1].

What is the most radiosensitive part of a cell?

Essentials of Radiation Biology and Protection 2nd Edition

Question Answer
What are considered to be the most radioresistant phases of the cell cycle? Mid-to Late S-phase
What is considered to be the most radiosensitive part of a cell? Nucleus
Cell death which occurs before mitosis is termed: Interphase Death
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Which is the most radiosensitive ovarian tumor?

The TOV21G and CAOV4 lines showed the highest levels of radiation sensitivity, while HEY, and OVCA420 were the most radioresistant from the panel tested. Curiously, the control cell line IOSE29, derived from normal ovarian tissue, is intermediate in the range of radiosensitivities measured (Fig. 1).

Which Tumour is least sensitive?

The least sensitive are nerve cells and muscle fibers.

Which of the following primary bone tumors is the most radiosensitive?

Ewing’s sarcoma is the most radiosensitive of the bone sarcomas. Radiotherapy may be used as the primary local control modality or combined with surgery.

When are cells most sensitive to radiation?

Cells in late G2 and mitosis (M-phase) are the most sensitive to radiation, and cells in late synthesis (S-phase) are the most resistant (Fig. 23.10).

How do you rid your body of radiation?

Gently washing with water and soap removes additional radiation particles from the skin. Decontamination prevents radioactive materials from spreading more. It also lowers the risk of internal contamination from inhalation, ingestion or open wounds.

What are 5 effects of radiation?

Radiation Effects on Humans

Dose (rem) Effects
5-20 Possible late effects; possible chromosomal damage.
20-100 Temporary reduction in white blood cells.
100-200 Mild radiation sickness within a few hours: vomiting, diarrhea, fatigue; reduction in resistance to infection.

What organs are affected by radiation?

Let’s do a head-to-toe walk-through to investigate how high doses of radiation can damage the human body.

  • Brain. Nerve cells (neurons) and brain blood vessels can die, leading to seizures.
  • Eyes. Radiation exposure increases the risk of cataracts.
  • Thyroid. …
  • Lungs. …
  • Heart. …
  • GI tract. …
  • Reproductive organs. …
  • Skin.
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