Radiation Therapy Skin Reactions Grading

A 62-year-old patient with Stage III breast cancer is receiving external beam radiation therapy aimed at the upper left quadrant of the chest. The radiation oncologist explains that during the course of treatment, it is crucial for the patient to understand the effects of radiation on healthy tissues surrounding the target area. One of the common side effects of radiation therapy is skin irritation, also known as radiodermatitis, which typically occurs in the treatment field. The oncology nurse informs the patient that they should monitor for signs of inflammation and report any unusual changes.

In this context, radiodermatitis can be graded on a scale of 1 to 4 based on severity. Mild erythema corresponds to a grade of ________ and moderate dry desquamation corresponds to a grade of ________.