Picciani et al reported the Geographic Tongue Area and Severity Index (GTASI). This can determine the severity of geographic tongue. The authors are from multiple institutions in Brazil.
Patient selection: geographic tongue
Sites examined:
(1) apex
(2) borders
(3) lingual belly
(4) dorsum
Each site is scored for:
(1) erythema
(2) white hallo
(3) fissuring
The area of involvement is also scored.
Parameter
Finding
Points
erythema
none
0
mild
1
moderate
2
marked
3
severe
4
white halo
none
0
thin
1
moderately thick
2
thick
3
very thick
4
fissuring
no
0
yes
1
area
0%
0
< 10%
1
10 to 29%
2
30 to 49%
3
50 to 69%
4
70 to 89%
5
90 to 100%
6
initial subscore for each site =
= (points for area) * (SUM(points for erythema, white halo, fissuring))
Site
Weighting Factor
apex
0.1
borders
0.3
lingual belly
0.2
dorsum
0.4
final subscore for each site =
= (initial subscore) * (weighting factor)
total score =
= SUM(final subscores for all 4 sites)
Interpretation:
• minimum score: 0
• maximum score: 54
• The higher the score the more severe the geographic tongue.
Total Score
Severity
0 to 6.99
mild
7 to 11.99
moderate
>= 12
severe
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