Welcome to HCM!
Hi, If I were your treating Doctor for this case of postauricular lump, I would come up with three possibilities, these include:
1. lymph nodes due to some chronic disorder like
tuberculosis,
lymphoma or chronic throat /
neck infection or even malignant diseases in elderly people!
2. The second possibility is of benign and simple conditions like lipoma or
neurofibroma or some bony osteoma; there is nothing to worry about these!
3. The last possibility is of sebaceous cyst or some other cysts like branchial cyst or lymphatic cysts! Nothing to worry about these also!
4. in rare case it could be some inflamed/engorged nerve also; this needs clinical examination and NCV test
I suggest you to go for an FNAC and
ultrasound of the lump for confirmation and to relieve your concerns!
Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions.
Wishing you good health