Table 2.

The skin dose mapping program determines the amount of skin area receiving doses within the four ranges where effects can be expected.

		Approximate Time of Onset of Effects
Single-Site Acute Skin-dose Range (Gy)	NCI Skin Reaction Grade	Prompt	Early	Midterm	Long Term
0–2	NA	No observable effects expected	No observable effects expected	No observable effects expected	No observable effects expected
2–5	1	Transient erythema	Epilation	Recovery form hair loss	No observable effects expected
5–10	1–2	Transient erythema	Erythema, epilation	Recovery; at higher doses, prolonged erythema, permanent partial epilation	Recovery; at higher doses, dermal atrophy or induration
10–15	2–3	Transient erythema;	Erythema, epilation; possible dry or moist desquamation; recovery form desquamation	Prolonged erythema; permanent epilation	Telangiectasia; dermal atrophy or induration; skin likely to be weak
>15	3–4	Transient erythema; after very high doses, edema and acute ulceration; long term surgical intervention likely to be required	Erythema, epilation moist desquamation	Dermal atrophy secondary ulceration due to failure of moist desquamation to heal; surgical intervention likely to be required: at higher doses, dermal necrosis, surgical intervention likely to be required	Telangiectasia; dermal atrophy or induration; possible late skin breakdown; wound might be persistent and progess into a deeper lesion; surgical intervention likely to be required