Final answer:
Carcinoma in situ is the noninvasive early stage of cancer in a single layer of cells and is considered the most curable. It is usually detected through routine screening or by noticing early warning signs, and it can be confirmed through a biopsy.
Step-by-step explanation:
The term you're looking for is carcinoma in situ, which is the noninvasive early stage of cancer in a single layer of cells. It is considered the most curable stage of cancer. Carcinoma in situ refers to abnormal cells that have not yet invaded neighboring tissues. It is usually detected through routine screening or by noticing early warning signs, and it can be confirmed through a biopsy.