You are operating a rudimentary field hospital for the local population while performing your UW mission. The next person in line is a mother/child combo with the mother very concerned/frantic over the child's new "illness".
Her English is poor and you can't get much history out of her except the following.
She reports that a big bump has arisen inside the mouth of her 6 yr old child. She is very concerned that this could be deadly as it has arisen in the last 48 hours with no other symptoms.
You get the child to open his mouth.. "abra la boca."
You peer inside with your flashlight/tongue depressor.
You, "¿duele?"
The child, "no"
You see the following.... what might it be (differential DX) ? What do you think is it? What should you do based on your Diagnosis? IS THE PATIENT GOING TO DIE as the mother fears?
?