I apologize to anxious readers for the tardy answer.
The answer to the "tender ear lesion" is #4 Candida.
Congrats to the brilliant diagnosticians who got it. This was very hard because the ear is not a common site for a yeast infection and only 7% of the doctors taking the quiz online got it right. The most common answer from physicians was squamous cell carcinoma.
A few give-aways: