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Ductal carcinoma in situ, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

ductal carcinoma in situ of breast



A cluster of malignant cells in the mammary ducts that has not spread to surrounding breast tissue. It is the most common noninvasive breast cancer and accounts for 25% of all breast cancer diagnoses. If left untreated, as many as 50% of patients with DCIS will develop invasive cancer. Because these cells grow in the ducts, they develop without forming a palpable mass. In its early stage this condition can be diagnosed through the use of mammography.


Lumpectomy is the most common treatment, followed by radiation. Mastectomy may be recommended if multiple areas are found or if there is a strong family history of breast cancer.

Synonym: comedocarcinoma See: breast cancer; mammography
Medical Dictionary, © 2009 Farlex and Partners

Patient discussion about DCIS

Q. Hi all. I was diagnosed with DCIS in April. Had a lumpectomy about 3 cm and it was removed. Am I cured fully? Hi all. I was diagnosed with DCIS in April. Had a lumpectomy about 3 cm and it was removed. I then had 28 radiation and 4 boosters. I went to the cancer center for my checkup and the doctor said nothing to worry. They didn’t advice me further follow up and I am normal for the past 6 months and not even taking tamoxifen. I am quite normal like others. Am I cured fully?

A. Hey nothing to worry!! Early diagnosis is half cured. The same thing applies to your case. With early diagnosis and treatment, the doctors should have removed the cancer parts with the surgery. Based on the report they have given you radiation and other meds. If you be estrogen +ve then they would have given you it as a preventive. By the way if you have any doubts better approach your doctor and have your checkup done as a precautionary measure.

Q. My wife is diagnosed with DCIS type of breast cancer. My wife is diagnosed with DCIS type of breast cancer. Doctors had staged my wife`s cancer as low. She is still due for some tests which she will soon have. Doctor have told that there is nothing much to worry so why are they taking so many tests?

A. All the tests are taken to confirm about the type of treatment to be given. These pre treatment tests can avoid the risk of post treatment complications. Even if the complications arise they will know the best possible course of counter treatment. So please cooperate with the doctor.

More discussions about DCIS
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References in periodicals archive ?
Patients with high-risk lesions and DCIS, as confirmed with histopathology findings, were included in the study.
In the routine histopathologic reports of the cases included in this study, information regarding the absence or presence of DCIS and the absence or presence of invasive carcinoma was available in 40 cases (83.3%) and 43 cases (89.6%), respectively.
Despite the small number of patients ultimately included in the analysis, our series demonstrated that intraductal papillomas with atypia significantly predicted for an associated breast malignancy, the majority of which were DCIS. This finding is supported by the literature, prompting our team to resect all intraductal papillomas with atypia.
(8) Previous South African series conducted in the private health sector, where some breast cancer screening is practised, demonstrated an isolated DCIS rate of 11.5%, in a review of 165 patients undergoing breast conservation surgery.
In this study, the aim was to correlate mammographic features and especially casting type calcifications with prognosis in a large cohort of women with primary DCIS and a long follow-up.
Tamoxifen was approved by the US Food and Drug Administration (FDA) as endocrine therapy for DCIS in 2000, and recent trials have reported promising results for other endocrine agents, including the aromatase inhibitor anastrozole [7, 8].
Histological diagnosis was acquired from 14 of the 26 patients (invasive ductal carcinoma (IDC), 4; fibroadenoma, 4; mastopathy, 4; DCIS, 2).
The most common form of non-invasive, or early, breast cancer is ductal carcinoma in situ (DCIS) and occurs when cancer cells develop in the milk ducts but have not yet spread to the surrounding breast tissue.
A CONDITION called ductal carcinoma in situ (DCIS) is--or is not--a precursor of breast cancer.
The battalion is composed of six DCMs each consisting of a DCIS troop and a support troop, Maintenance and Support Company, and the battalion HQs.
A recent study reported in JAMA Oncology evaluated 10-year and 20-year breast cancer-specific mortality following diagnosis and treatment of ductal carcinoma in situ (DCIS) using the Surveillance, Epidemiology, and End Results (SEER) registries.