Which of the following layer of epithelium of oral mucous membrane is most sensitive to radiation?: (A) Stratum spinosum, (B) Stratum granulosum, (C) Stratum basale, (D) Stratum corneum
Answer is C. The oral mucosa contains a basal layer composed of rapidly dividing, radiosensitive progenitor cells.
Key Concept:
Rapidly dividing cells are more susceptible to radiation therapy.
White and Pharoah's Oral Radiology Principles and Interpretation 8th edition