VASI (Vitiligo Area Scoring Index)
The Vitiligo Area Scoring Index (VASI; Hamzavi and colleagues 2004).
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Trunk: involved area in HAND UNITS
- 20 hand units
- Trunk: residual depigmentation
- The depigmented and pigmented areas are equal
- Hands: involved area in HAND UNITS
- 2 hand units
- Hands: residual depigmentation
- No pigment is present
Result: Total-body VASI 12 of 100.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Hand unit
- The PATIENT'S OWN palm including fingers = 1% of their body surface area. Patient-relative, not absolute.
- Depigmentation
- An ORDINAL LADDER: only 0, 10, 25, 50, 75, 90, 100. Chosen by description, never a free percentage.
- Regions
- Six mutually exclusive: upper extremities EXCLUDE hands, lower EXCLUDE feet. The original used five.
- Direction
- Higher is worse. The score falls as repigmentation occurs; trials use percent change.
- Scope
- Extent and severity only. Not disease activity, not a diagnosis, not phototherapy dosing.
What you enter
- Head and neck: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area.
- Head and neck: residual depigmentation.
- Hands: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area.
- Hands: residual depigmentation.
- Upper extremities, EXCLUDING the hands: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area.
- Upper extremities, EXCLUDING the hands: residual depigmentation.
- Trunk: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area.
- Trunk: residual depigmentation.
The other 4 fields
- Head and neck: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area. Leave blank or 0 if not involved.
- Head and neck: residual depigmentation. An ORDINAL LADDER chosen by description, not a free percentage [0 = No depigmentation; 10 = Only specks of depigmentation are present; 25 = The pigmented area exceeds the depigmented area; 50 = The depigmented and pigmented areas are equal; 75 = The depigmented area exceeds the pigmented area; 90 = Specks of pigment are present; 100 = No pigment is present]
- Hands: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area. Leave blank or 0 if not involved.
- Hands: residual depigmentation. An ORDINAL LADDER chosen by description, not a free percentage [0 = No depigmentation; 10 = Only specks of depigmentation are present; 25 = The pigmented area exceeds the depigmented area; 50 = The depigmented and pigmented areas are equal; 75 = The depigmented area exceeds the pigmented area; 90 = Specks of pigment are present; 100 = No pigment is present]
- Upper extremities, EXCLUDING the hands: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area. Leave blank or 0 if not involved.
- Upper extremities, EXCLUDING the hands: residual depigmentation. An ORDINAL LADDER chosen by description, not a free percentage [0 = No depigmentation; 10 = Only specks of depigmentation are present; 25 = The pigmented area exceeds the depigmented area; 50 = The depigmented and pigmented areas are equal; 75 = The depigmented area exceeds the pigmented area; 90 = Specks of pigment are present; 100 = No pigment is present]
- Trunk: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area. Leave blank or 0 if not involved.
- Trunk: residual depigmentation. An ORDINAL LADDER chosen by description, not a free percentage [0 = No depigmentation; 10 = Only specks of depigmentation are present; 25 = The pigmented area exceeds the depigmented area; 50 = The depigmented and pigmented areas are equal; 75 = The depigmented area exceeds the pigmented area; 90 = Specks of pigment are present; 100 = No pigment is present]
- Lower extremities, EXCLUDING the feet: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area. Leave blank or 0 if not involved.
- Lower extremities, EXCLUDING the feet: residual depigmentation. An ORDINAL LADDER chosen by description, not a free percentage [0 = No depigmentation; 10 = Only specks of depigmentation are present; 25 = The pigmented area exceeds the depigmented area; 50 = The depigmented and pigmented areas are equal; 75 = The depigmented area exceeds the pigmented area; 90 = Specks of pigment are present; 100 = No pigment is present]
- Feet: involved area in HAND UNITS, where one unit is the patient's own palm including fingers and equals 1 percent of body surface area. Leave blank or 0 if not involved.
- Feet: residual depigmentation. An ORDINAL LADDER chosen by description, not a free percentage [0 = No depigmentation; 10 = Only specks of depigmentation are present; 25 = The pigmented area exceeds the depigmented area; 50 = The depigmented and pigmented areas are equal; 75 = The depigmented area exceeds the pigmented area; 90 = Specks of pigment are present; 100 = No pigment is present]
How this is calculated
- Formula
- Sum over regions of (hand units of involvement) x (residual depigmentation).
- Range
- Total-body 0 to 100. Facial VASI is 0 to 3 and is a DIFFERENT scale; never share a band table.
Hamzavi I, Jain H, McLean D, Shapiro J, Zeng H, Lui H. Parametric modeling of narrowband UV-B phototherapy for vitiligo using a novel quantitative tool: the Vitiligo Area Scoring Index. Arch Dermatol. 2004;140(6):677-683. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.