CPB (Certified Professional Biller) Certification 2025 – 400 Free Practice Questions to Pass the Exam

Carcinomas in situ refers to noninvasive tumors that have not yet spread beyond the layer of tissue in which they originated. This term describes a stage of cancer that is localized and has not invaded surrounding tissues or metastasized to other parts of the body. Carcinomas in situ are often considered early-stage cancers and may be treatable through surgical intervention, as they have not developed the ability to invade deeper structures or spread to other areas.

The other categorizations pertain to different characteristics of tumors. While benign tumors are noncancerous and do not spread, invasive tumors indicate that the cancer cells have begun to invade surrounding tissues, which is not the case with carcinomas in situ. Malignant tumors can be invasive and have the potential to metastasize. Therefore, recognizing carcinomas in situ as noninvasive is crucial for understanding its classification and potential treatment options.