Hi and welcome to HCM.
These findings are nonspecific and there isnt some significant or serious abnormality. Mesenterial adenitis
is diagnosis which is usualy found in people which have symtoms of appendicitis
. This is considered as viral abdominal lymph
nodes infection and there is no treatment neccessary. It usually pass in a few days with no consequences. He should only rest and take lot of fluids. Wish you good health.