When your cancer is described by the TNM system, there will be numbers after each letter that give more details about the cancer—for example, T1N0MX or T3N1M0. The following explains what the letters and numbers mean. Primary tumor (T) TX: Main tumor cannot be measured. T0: Main tumor cannot be found.

The cancer has grown into the outermost layers of the colon or rectum (T3) or through the wall of the colon or rectum (including the visceral peritoneum) (T4a) but has not reached nearby organs. It has spread to 1 to 3 nearby lymph nodes (N1a or N1b) or into areas of fat near the lymph nodes but not the nodes themselves (N1c).

TNM分期系统中：1，T（“T”是 肿瘤 一词英文“Tumor”的首字母）指肿瘤原发灶的情况，随着肿瘤体积的增加和邻近组织受累范围的增加，依次用T1~T4来表示。 2， N（“N”是淋巴结一词英文“Node”的首字母）指区域淋巴结（regional lymph node）受累情况。 淋巴结未受累时，用N0表示。 随着 淋巴结 受累程度和范围的增加，依次用N1~N3表示,3，M（“M”是转移一词英文“ metastasis ”的首字母）指远处转移（通常是 血道转移），没有远处转移者用M0表示，有远处 …

2024年3月19日 · Most likely it is stage 3. N1: 1 to 3 regional lymph nodes involvement. Mx: The status of distant metastasis is unknown or cannot be assessed. I believe there will be some updates on Mx. My father's diagnosis is T3d N2 MRF+ , stage 3 rectal cancer.

The main tumor has grown through the stomach wall and into nearby organs or structures (T4b). The cancer has spread to 3 to 6 nearby lymph nodes (N1). The cancer has not spread to distant parts of the body (M0). IIIC. T3. N3b. M0. The main tumor is growing into the subserosa layer (T3), AND the cancer has spread to 16 or more nearby lymph nodes ...

T1 means the tumour is only in the inner layer of the bowel (submucosa). T2 means the tumour has grown into the muscle layer of the bowel wall but no further. T3 means the tumour has grown through the muscle layer of the bowel and into the outer layer of the bowel wall (serosa).

肿瘤位置：1 个结节时，分为 T1a SS（Superficial Spreading，表浅扩散）和 T2 Centr（Central，中央）；同侧 2 个及以上结节时，分为 T3 Satell（Satellite，卫星）和 T4 Ipsi Nod（ipsilateral nodules，同侧结节）。

2022年6月24日 · 发生淋巴结转移时，若受累淋巴结主要位于肿瘤周围（即同侧 10～14 站），则归为 n1；若受累淋巴结已达中央区域（即 1～9 站），则归为 n2；若受累淋巴结已到达对侧，则归为 n3。

TNM system stands for Tumour, Node and Metastasis. It is the most common way to stage lung cancer. Doctors may also use the number system. A simpler and older staging system is sometimes used for staging small cell lung cancer. It describes the cancer as limited disease or extensive disease.

T表示原发肿瘤大小和范围，有T1、T2、T3、T4四个等级，数字越大表示肿瘤的体积和侵犯的范围越大；同时还有Tis和T0两种，分别表示肿瘤只到上皮层(原位癌)、所检查的部位没有发现肿瘤病灶。