Anaplastic -   a pathological description of cells, describing a loss of differentiation and more primitive appearance.   A loss of shape.   These cells are very far from normal, highly incurable, and highly radiosensitive.

Conventional fractionation – standard treatment – 5 times a week, 200 cGy a day = 1000 cGy a week.

Differentiation - To become distinct or specialized.   In our terms differentiation predicts how vunerable a cell will be to radiation.   The more differentiated a cells is the more radioresistant it will be.

Erythema Dose -   irradiation until the patients skin turns red.

Fractionation - treating patients over a period of time with small doses of radiation.

Hyperfractionation – (B.I.D.) treating a patient twice a day

Protracted fractionation – steching out the treatment for a longer period of time with smaller doses.

Mitosis - The entire process of cell division including division of the nucleus and the cytoplasm.

Mitotic future – the length of time mitosis can be expected to continue.

Radiosensitivity – a cells vunerability to radiation

Radioresistance – cell invulnerability to radiation.   Cell that are not vunerable toradiation are radio resistant.

Roentgen – ( R ) A unit of radiation exposure.  The amount of exposure the air receives (only for x-rays and gamma rays)