Hi, thanks for sharing your daughter's health concerns with HCM!
Well, If I were her treating Doctor for this case of bilateral neck lumps, I would come up with three possibilities, these include:
1. lymph nodes due to some chronic disorder like
dandruff in the scalp, viral infection,
tonsillitis,
tuberculosis, chronic throat / neck /ear/mouth infection!
2. The second possibility is of benign and simple conditions like lipoma or neurofibroma; there is nothing to worry about these!
3. The last possibility is of sebaceous cyst or some other cysts like
dermoid cyst or sebaceous 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 your daughter good health.