A nurse is reviewing a patient's tissue biopsy report. The result is positive for cancer and is classified as Tis N0 M0. How should the nurse interpret this result?

Choice A reason: "Tis" stands for carcinoma in situ, meaning the tumor is localized and has not invaded surrounding tissues. This classification clearly identifies the primary site, so the statement is incorrect. Choice B reason: "N0" indicates no regional lymph node involvement. Therefore, the statement about multiple lymph nodes being involved is inaccurate. Choice C reason: "M0" confirms that there are no distant metastases. This classification reflects early-stage cancer with limited spread, making this the correct interpretation. Choice D reason: "N0" means the lymph nodes were assessed and found to be free of cancer. The statement suggesting they could not be assessed is incorrect.