Oral Mucositis Assessment Scale (OMAS)

 

Parameters:

(1) ulceration and/or pseudomembrane

(2) erythema

 

Sites assessed:

(1) upper lip

(2) lower lip

(3) right cheek

(4) left cheek

(5) right ventral and lateral tongue

(6) left ventral and lateral tongue

(7) floor of mouth

(8) soft palate and fauces

(9) hard palate

 

Parameter	Finding	Points
ulceration and/or pseudomembrane	none	0
	< 1 square cm	1
	1 – 3 square cm	2
	> 3 square cm	3
erythema	none	0
	not severe (mild to moderate)	1
	severe	2

 

score for each site =

= (points for ulceration/pseudomembrane) + (points for erythema)

 

total score for all 9 sites =

= SUM(points for all 9 sites)

 

Interpretation:

• minimum site score: 0

• maximum site score: 5

• minimum total score: 0

• maximum total score: 45

• The higher the scores, the more severe the mucositis.