Hi @leae,
Thanks for your post.
It’s understandable that as you have been told you have dense fibrous multi cystic breasts bilaterally, you think you have a developed a new cyst in your untreated breast. However, as @misswoof-88, @claspe and @mssteel say it’s important to contact your breast care nurse or treatment team about any new or persistent changes. You are not being a nuisance.
From your further post it sounds like you have spoken to your breast care nurse, and they are going to check the lump. Your treatment team can assess and discuss what the new change could be and if it is another cyst, they can also suggest how to best to manage. It may be helpful to discuss your follow-up with them so you know who and when to contact with any other concerns.
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