Thanks for this question
This is very concerning for sure.
I would suspect that he probably has either a systemic infection like tuberculosis or some other type of infection
The other possibility is an autoimmune condition like Wegener's, lupus or something else like that
I think he is on the correct path to getting a diagnosis though.
The workup seems correct.
let me know if you have other questions.
if done for now, please leave positive rating above the chat box so I can get credit for helping you today
we only get credit for helping clients after positive feedback
you can always reach me with "a question for Dr. Phil" in the medicine, cardiology or pharmacy categories if you have any other questions
here is my website if you need to reach me again:
Thanks for using JustAnswers.com