The case history of a 25-year-old man suffering from idiopathic alveol
ar proteinosis is described. The patient showed a prolonged stable mil
d disease and a distinct suppressive phenotypic profile of BALF lympho
cytes. Specifically, a low T4/T8 ratio and a high percentage of CD11b T8 lymphocytes was found. Correlations with disease expression are ma
de.