Which cancer is associated with lymph nodes that test positive?

Breast cancer is often associated with lymph nodes that test positive because it has a tendency to metastasize, or spread, to nearby lymph nodes, particularly those in the axillary (armpit) region. The involvement of lymph nodes is a common way to assess the stage of breast cancer and to understand the extent of the disease. When breast cancer cells spread to lymph nodes, they can often be detected during procedures like sentinel lymph node biopsy or axillary dissection, where the status of these lymph nodes can provide critical information about prognosis and treatment planning.

In contrast, while other types of cancer (such as prostate or lung cancer) can also spread to lymph nodes, the specific association with testing positive in lymph nodes is particularly prominent in breast cancer. Acute Myeloid Leukaemia typically affects the bone marrow and blood rather than solid tumors that localize and spread to lymph nodes, making it less relevant in this context. Therefore, the strong link between breast cancer and positive lymph nodes makes it the best answer for this question.