The Major Puzzlement Over Stage Zero Breast Cancer (DCIS)

Visualize one going in for a routine mammogram and are gladly informed by the doctor that one does not have breast cancer. However, the ‘catch-22’ situation occurs when the doctor then informs that one is having a major risk factor for the invasive form of cancer known as DCIS or ductal carcinoma in situ, at times also known as ‘stage zero’ cancer. DCIS is a condition wherein the anomalous cells have laid siege in one or more ducts in the breasts – the conduits that connect the milk-secreting lobes to the nipples. This means that the anomalous cells have not yet spread to the other breast tissues. The likelihood of them spreading or not, is still quite unclear.

Hence, when one is faced with such tricky situation, it is no wonder why DCIS detection could lead to major confusion and frustration. The doctor would firstly inform about not getting anxious as DCIS is not an invasive cancer and most probably would never be (With treatment, a decade of survival rate is mostly cent percent). On the contrary, the doctor would also inform that surgical excision of the cells and at times radiation might be needed. This would mean undergoing quite the similar course of treatment that would be adopted in case one had cancer. Despite DCIS being treated at all times, researchers concur that not all detected cases would have even become perilous.

A latest report by the NIH has stated that mammography is majorly responsible for the rise in DCIS detections and the panel has stated that nearly one million women would be detected with DCIS by the year 2020. Prior to the prevalent use of mammography, majority of the breast lesions were detected in the stage when they became palpable. With the conjecture that prompt detection is the idyllic manner of curing the disease, hence the active lookout for breast cancer continues. And as cancer is not necessarily detected only in the preliminary phases, it could at times even be in an intermediary stage between the normally occurring breast cells and malignant ones.

In DCIS, cells proliferate swiftly and vary in dimension, outline and architectural setup from the normal ductal cells, resembling more alike the invasive cancer. The lesser the cells bear a resemblance to their normal parental cells, the higher the risk element would be, especially the occurrence of lifeless cells (necrosis) and among younger age women (along with other risk elements). All these aspects indicate a likely more-belligerent type of DCIS that could relapse or turn invasive.

Whether DCIS would progress to invasive breast cancer or would not, is a matter still not known in detail to the experts. With a few exemptions like the small-sized, low-grade tumor growths among older women having other health ailments – the routine exercise is for treating the disease instead of monitoring it over spans of time, to observe its progression.

Presently the treatment for DCIS comprises of surgical intervention like lumpectomy or mastectomy, on the basis of how widespread the anomalous cells appear in the ducts. In case they show concentrations in one location, the general treatment would involve lumpectomy and subsequent radiation that has been observed to lower the chances of relapse by half in the same breast (not in the other breast).

Few women might undergo a mastectomy in case the anomalous cells have spread to several locations; they would then not require post-surgery radiation therapy. In few women, especially those in the young age bracket and having a family past of breast cancer or a genetic alteration that raises their risk of developing the disease, also choose to undergo double mastectomy. A recent study revealed that the number of double mastectomy done by DCIS patients has risen from 4.1 to 13.5 percent from 1998 to 2005.

Experts have pointed that some of the women could be spared the unnecessary treatment by devising medicine that could help in categorising women according to risk, by scrutinising genetic constitution of the tumor, the kind of proteins it is observed to express, or via other means. For instance, cells having a particular gene fingerprint that were not prone to becoming invasive would not need radiation. The experts have however stated that it would be tricky to envisage not carrying out any form of surgery.

A major argument looms over the fact that as mammography has been carried out so frequently, several preliminary cancers have been detected, however the number of cases being detected in more proliferated stages has not greatly reduced. This indicates that despite the fact that screening helps in finding breast cancers earlier on, there are few initial stage cancers that might never need treatment, while there are few of the invasive cancers that are slyly eluding discovery by screening. Hence, further research is needed for decoding which cases are at increased risk of the disease and whether lower-risk cases could be treated is less aggressive manner.

With a dearth of that kind of information, a prompt resolution would be reducing breast screening among elderly women past 70-75 years as there are no records whether mammography enhances survival rates among them. Also, calcifications pegged at low-risk must not be recommended biopsy.

Experts stated that it is imperative to evolve alternative means to averting invasive breast cancer. For instance, on-going research on the effectiveness of using statins prior to surgery among women having high-grade DCIS could produce desirable variations in the tumor and whether it would lower the likelihood that invasive cancer could arise.

A latest study is researching if hormonal therapies like tamoxifen and aromatase inhibitors could cause amelioration among women having DCIS who have breast cells that are estrogen-receptor positive.

One lately concluded study was conducted on more than sixty women wherein hormone therapy was given for 3 months prior to surgery. The MRI scan done prior to and at the conclusion of the study revealed tumors with significant extent of shrinkage and microscopically appeared less cancerous after the hormone therapy.

The next in pipeline study would be more wide-scaled wherein women would be treated for 6 months prior to surgery with the final aim being in identifying those women with DCIS that would not require surgery at all.

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