Of course he weight loss
of 5 kgs in 6,weeks is a cause of concen.!
But he has no significant fever except the small rise in temp mentioned!
Otherwise the first thought will be to rule out tuberculosis
in view of the symptoms and ultrasound
findings of few mesenteric lymph
As per reports,.mostly
The siginifacant abnormalities are ,
Lymph nodes in scan
Slightyly high ESR
of lymph node if any peripheral nodes are palpable on examination.
Record his temp and note.
Change his food to his liking
Is there any underlying psychological cause?peer pressure?
( investigate carefully!!)