Minimal PTB old scar

If you have a visible scar due to old PTB then you will not get a work visa.  It does not matter for the GCC countries that you have no disease now and are cured - any evidence of old TB disease is enough to reject visa for you (as a new visa applicant).

Dear
May 2018, I went medical exam at karama,they found  lung scar and told me to go muhaisinah. The consultant just cross check my previous record then made my medical fit.
Now I would like to switch company within the Dubai.
How they wil treat
me either new visa or existing expats already in uae??
I hope u can clear me

If it is a transfer then existing expat already in uae.

Cancelled and new visa within Dubai brother
Thanks for ur answer

Same as long as the new visa is stamped within the grace period.

Brother
Actually my visa expired on may, so current announcement is no grace period once visa got cancelled.
I can switch to other company by paying penalties for few over days.
Will make a trouble??

It can or it may not. Best to check through your sponsor. Nowadays things change every other day.

Switching to new employer is not a problem, they accept it by paying penalties for few days upto making work permit.
My doubt is
Will medical centre consider my visa within uae?

Have your employer apply and check.  As I said, things change everyday here.  They may accept or they may not.

Let me check and update