Hi, thanks for writing to HCM.
If I were your consultant for this case of back of head nodule, I would come up with three possibilities as per your description, these include:
1. lymph nodes due to some chronic disorder like
tuberculosis, dandruff, viral infection,
tonsillitis 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 skin papilloma/dermatofibroma; 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!
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.