Oncology Certified Nurse (OCN) Nursing Practice Test

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Prepare for the Oncology Certified Nurse Test. Enhance your skills with flashcards and multiple-choice questions, each backed by hints and explanations. Get ready for your certification!

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What is characterized as noninvasive breast cancer?

Invasive Ductal Carcinoma
In-Situ Cancer
Inflammatory Breast Cancer
Aneuploidy

The correct answer is: In-Situ Cancer

Noninvasive breast cancer is best characterized by in-situ cancer, which refers to cancer that has not invaded surrounding tissues and remains confined within the ducts or lobules of the breast. In-situ cases include ductal carcinoma in situ (DCIS) and lobular carcinoma in situ (LCIS). These types of cancer are significant because they indicate abnormal cell growth without the presence of invasive characteristics, meaning they have not spread outside their original location. Proper identification and management of in-situ breast cancer are critical, as they can precede invasive cancer if left untreated. Terms like invasive ductal carcinoma and inflammatory breast cancer refer to more aggressive forms of breast cancer that have invaded surrounding tissues and potentially spread to lymph nodes or other parts of the body. Aneuploidy, on the other hand, relates to abnormalities in chromosome number and is a genetic characteristic often found in cancers but does not define a type of cancer itself. Thus, in-situ cancer perfectly fits the definition of noninvasive breast cancer.