It consists on determining the number of aggregates of mononuclear cells mainly lymphocytes, plasma cells and histiocytes that can be observed in a 4 mm of glandular tissue, using indexes from 1+ to 4+, where 0 would represent a normal minor salivary gland and considering the fact that each <<aggregate>> or <<focus>> is equivalent to 50 cel/4 mm. Fibrosis degree was subjectively established as follows: absent = 0, minimum = 1+, moderate = 2+, severe = 3+.
Esta escala muestra un balance adecuado entre sensibilidad y especificidad 82.4 y 86.2% respectivamente y consiste en determinar el número de agregados de células mononucleares en su mayoría linfocitos, células plasmáticas e histiocitos, que se observan en un campo de 4 mm de tejido glandular, empleando un índice de 1+ al 4+, con 0 representando una glándula salival labial menor normal, tomando en cuenta que cada <<agregado>> o <<foco>> equivale a 50 células/4 mm. El grado de fibrosis se establece subjetivamente como sigue: ausente = 0, mínimo = 1+, moderado = 2+, severo = 3+.