17869 Ductal Carcinoma In Situ Dcis

Overview

Ductal carcinoma in situ (say: DUK-tul kar-sin-OH-muh in SY-too), often called DCIS, is a condition where abnormal cells are found in the lining of a milk duct in the breast. These cells have not spread outside the duct into nearby breast tissue, so it is not considered an invasive cancer. Many doctors call it a pre-cancer or stage 0 breast cancer.

DCIS is fairly common. In the UK, it makes up about 1 in 5 new breast cancer diagnoses. It is the most common type of non-invasive breast change.

DCIS mostly affects women, especially those over 50. It can also occur, rarely, in men. People who have gone through menopause are more likely to be diagnosed with DCIS.

Symptoms

Common symptoms

• Often has no symptoms at all, which is why it is usually found on a screening mammogram.
• A new lump in the breast or armpit.
• Nipple discharge, especially if it is spontaneous or blood-stained.
• A scaly, red, or thickened area of the nipple or breast skin.

Symptoms in children

• DCIS does not affect children. This condition is related to adult breast tissue that is fully developed.

Symptoms in older adults

• In older adults, the symptoms are the same, but other health conditions may affect treatment choices.
• Older adults may be less likely to receive aggressive treatments if the DCIS is slow-growing.

Causes

Main causes

• The exact cause of DCIS is not fully understood. It is linked to hormonal factors, especially oestrogen, which can make breast cells grow abnormally.
• Some genetic changes (mutations) can increase the risk of developing DCIS.

Risk factors

• Getting older (most common over age 50).
• Having a mother, sister, or daughter with breast cancer.
• A personal history of breast conditions or previous breast biopsy.
• Using hormone replacement therapy (HRT) for a long time.
• Being overweight or obese after menopause.
• Drinking alcohol regularly.

When to see a doctor

See a doctor urgently if:

• If you discover any new lump in your breast or armpit.
• If you have nipple discharge that is bloody or comes from only one breast.
• If you see a change in the skin of your breast, like dimpling, puckering, or a rash.
• If you have persistent, unusual breast pain.

Book a routine appointment if:

• Attend all routine breast screening appointments when offered.
• If you are worried about your risk or have a family history, talk to your doctor during a regular check-up.

Diagnosis

DCIS is usually found after a breast screening mammogram. If the mammogram shows a suspicious area, your doctor will refer you to a specialist breast clinic for more tests. The only way to confirm DCIS is with a biopsy, where a small sample of tissue is examined under a microscope.

Tests that may be done

• Mammogram (special X-ray of the breast).
• Ultrasound (uses sound waves to create an image of the breast).
• Core needle biopsy (a small needle is used to remove a tissue sample).
• Sometimes, magnetic resonance imaging (MRI) scans are used for further detail.

What to expect at your appointment

At the breast clinic, a specialist doctor will look at your tests and explain the results. If DCIS is found, the doctor will talk with you about your treatment options. It can feel overwhelming, so you will usually be assigned a breast care nurse to support you and answer questions.

Treatment

Treatment for DCIS aims to remove the abnormal cells and stop them from becoming invasive breast cancer. The main treatment is surgery, often followed by radiotherapy. In some cases, hormone therapy may be suggested. Because DCIS is non-invasive, the chance of a full cure is very high.

Self-care at home

• While waiting for tests or treatment, try to eat well, rest, and manage stress.
• Talk to your breast care nurse about any concerns you have.
• Do not try to treat the condition yourself with any supplements or home remedies. Always follow your doctor's advice.

Medical treatments

Treatment approaches generally include surgery to remove the diseased area (such as lumpectomy or mastectomy), radiotherapy to lower the chance of it returning, and hormone therapy if the DCIS is hormone-sensitive. Your doctor will recommend the best plan for your situation.

When is surgery considered?

Most people with DCIS will have surgery. The goal is to take out all the abnormal cells and check that there are no invasive cancer cells. The type of surgery depends on the size and location of the DCIS and your personal preferences.

Living with this condition

After treatment, you will have regular check-ups and mammograms to monitor your breast health. It is important to stay breast-aware and report any changes to your doctor.

Lifestyle tips

• Keep a healthy weight, as excess body fat is linked to breast cancer risk.
• Limit alcohol to less than 1 drink per day, or avoid it entirely.
• If you smoke, make a plan to quit. Smoking harms healing and increases cancer risk.
• Stay physically active with at least 30 minutes of moderate exercise most days.

Diet and exercise

Aim for a balanced diet rich in fruits, vegetables, whole grains, and lean proteins. Regular exercise, such as walking or swimming, can boost your energy and mood. It also helps you maintain a healthy weight.

Mental health and emotional wellbeing

A DCIS diagnosis can cause anxiety and worry, even though it is not invasive. Many people feel fear, sadness, or difficulty sleeping. These feelings are normal and you deserve support.

Prevention

DCIS cannot be fully prevented, but you can lower your risk by making healthy lifestyle choices, such as keeping a healthy weight, limiting alcohol, and staying active. There is no sure way to avoid it.

Vaccines

There is no vaccine to prevent DCIS. However, staying up to date on all recommended health screenings is important.

Screening programmes

Regular breast screening with mammograms can detect DCIS early, often before any symptoms appear. In the UK, the NHS screening programme invites women aged 50 to 70 for routine screening every 3 years. Talk to your doctor about your personal screening schedule.

Complications

If left untreated

• If left untreated, some, but not all, DCIS can progress to invasive breast cancer, meaning the abnormal cells may eventually break out of the duct and spread into breast tissue.
• Invasive breast cancer is a more serious condition and requires more extensive treatment.

Long-term outlook

The outlook for DCIS is very good. With appropriate treatment, the cure rate is nearly 100%. After treatment, you will be watched closely by your medical team to make sure the condition does not come back. Most women with DCIS go on to live long, healthy lives.

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