Hello,
I had a screening mammogram in September and was subsequently diagnosed with DCIS. After the initial shock I was feeling positive. I have been offered a lumpectomy with a reconstruction or a mastectomy. I have chosen a lumpectomy, but since receiving my letter on Saturday, I am now beginning to panic as the letter states it measures 46mm!
I am not sure if that is the DCIS or the area to be removed with clear margins. If it is the DCIS then should I choose the mastectomy as it’s so large?
During my initial appointment with my surgeon, the size was not mentioned but I thought it was small clusters.
I am meeting with him again tomorrow but I am not sure what to ask or whether to change my mind.
Thank you
Hi - I hope your consultation went well. I have also been recently diagnosed with High Grade DCIS - measuring 68mm. Like you I had trouble getting my head round the size of it! I was given the option of a Therapeutic Mammoplasty plus radiotherapy - which I took and am booked in for the surgery on 4 November. I think it was suitable as I am ‘generously breasted’. Let me know how you got on.
Hi @lou_lou1,
Firstly, welcome to the forum - I hope you find it a welcoming and supportive place. I am so sorry to hear of your diagnosis - I’m sure you’re feeling quite overwhelmed with all the information being thrown at you.
You can find information about DCIS on our website here which you might find helpful to read through Ductal carcinoma in situ (DCIS) | Breast Cancer Now
You can also use the search function on the forum to find any posts relating to DCIS and you might find someone who has been through the same experience as you or asked the same questions.
Please know that if you should want to speak to someone over the phone, you can reach our nurses on 0808 800 6000 - they are there for any questions you have, advice you need, or even if you just want a chat about what you are going through. You can also ask them any question over on the Ask our Nurses your questions - Breast Cancer Now forum where they’ll come back to you.
Sending you all the best of luck for your meeting with your consultant,
Alice 
I think it’s the overall area of the DCIS but I could be wrong . I was diagnosed in August with High grade DCIS and a tiny invasive grade 2 which is her + . I opted for mastectomy and the pathology revealed 154mm of DCIS ! My surgeon explained it was in clusters through my whole breast but that it’s classed as pre cancer , however in my case they found seperate invasive cancers all under 1cm but it means I’m having chemo and herceptin in November.