We are independent & ad-supported. We may earn a commission for purchases made through our links.
Advertiser Disclosure
Our website is an independent, advertising-supported platform. We provide our content free of charge to our readers, and to keep it that way, we rely on revenue generated through advertisements and affiliate partnerships. This means that when you click on certain links on our site and make a purchase, we may earn a commission. Learn more.
How We Make Money
We sustain our operations through affiliate commissions and advertising. If you click on an affiliate link and make a purchase, we may receive a commission from the merchant at no additional cost to you. We also display advertisements on our website, which help generate revenue to support our work and keep our content free for readers. Our editorial team operates independently of our advertising and affiliate partnerships to ensure that our content remains unbiased and focused on providing you with the best information and recommendations based on thorough research and honest evaluations. To remain transparent, we’ve provided a list of our current affiliate partners here.

What is Carcinoma in Situ?

By Amy Hunter
Updated Mar 03, 2024
Our promise to you
The Health Board is dedicated to creating trustworthy, high-quality content that always prioritizes transparency, integrity, and inclusivity above all else. Our ensure that our content creation and review process includes rigorous fact-checking, evidence-based, and continual updates to ensure accuracy and reliability.

Our Promise to you

Founded in 2002, our company has been a trusted resource for readers seeking informative and engaging content. Our dedication to quality remains unwavering—and will never change. We follow a strict editorial policy, ensuring that our content is authored by highly qualified professionals and edited by subject matter experts. This guarantees that everything we publish is objective, accurate, and trustworthy.

Over the years, we've refined our approach to cover a wide range of topics, providing readers with reliable and practical advice to enhance their knowledge and skills. That's why millions of readers turn to us each year. Join us in celebrating the joy of learning, guided by standards you can trust.

Editorial Standards

At The Health Board, we are committed to creating content that you can trust. Our editorial process is designed to ensure that every piece of content we publish is accurate, reliable, and informative.

Our team of experienced writers and editors follows a strict set of guidelines to ensure the highest quality content. We conduct thorough research, fact-check all information, and rely on credible sources to back up our claims. Our content is reviewed by subject-matter experts to ensure accuracy and clarity.

We believe in transparency and maintain editorial independence from our advertisers. Our team does not receive direct compensation from advertisers, allowing us to create unbiased content that prioritizes your interests.

Carcinoma in situ is an early form of carcinoma that has not moved into surrounding tissues. It does not typically form a tumor, although there are a few exceptions to this. This type of carcinoma typically grows in a flat patch or along the curve of the body where it is located. While carcinoma in situ itself is not invasive or malignant, if left untreated, it can develop into an invasive form of carcinoma. Most doctors refer to it as a pre-cancer, and want to remove the lesion before it has a chance to develop into a malignant form of carcinoma.

Some of the different forms of carcinoma in situ include bladder and cervical cancers, ductal carcinoma in situ, which is a form of breast cancer, colon polyps, and Bowen's disease, which is carcinoma of the skin. The only form considered deadly is bronchioloalveolar carcinoma. This condition develops in the lung, eventually expanding to fill the lung, making it impossible to breathe. Bronchioloalveolar carcinoma is malignant, so its classification in this group of carcinomas is controversial.

One common form of carcinoma in situ is Bowen's disease. Bowen's disease is an early form of squamous cell carcinoma. Bowen's disease is more common in women than men, and can develop anywhere on the body. It is triggered by sun damage, immune suppression, viral infections, or because of skin injury. Bowen's disease begins as an enlarged area with an irregular border, and, left alone, may become malignant. A physician removes the plaque in one of several ways; with local chemotherapy, freezing it using cryotherapy, or surgically.

Some forms of carcinoma in situ do develop into tumors if left untreated. Colon polyps and some forms of breast cancer are both examples of malignant tumors that begin as carcinoma in situ. Regardless of whether the carcinoma is located in a spot where it is likely to develop into a tumor or not, it is important that it be removed as quickly as possible.

Carcinoma in situ is not malignant or invasive, so there are no stray cancerous cells outside of the area of carcinoma. This means that removing the carcinoma will eliminate the risk of cancer. The method of removal depends on where the carcinoma is located. Doctors remove some carcinomas, such as colon polyps nonsurgically with an endoscope. Others require surgical removal, and still others are removed with a laser.

The Health Board is dedicated to providing accurate and trustworthy information. We carefully select reputable sources and employ a rigorous fact-checking process to maintain the highest standards. To learn more about our commitment to accuracy, read our editorial process.
Discussion Comments
The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.

The Health Board, in your inbox

Our latest articles, guides, and more, delivered daily.