tnm classification of tumours

1. T Primary tumour
TX Primary tumour cannot be assessed
TO No evidence of primary tumour
Tis Carcinoma in situ
T1 Tumour 2cm or less in greatest dimension
T2 Tumour >2cm but <4cm
T3 Tumour >4cm in greatest dimension
T4 Tumour invades adjacent structures
N Regional lymphnodes
NXRegional lymphnodes cannot be assessed
NONo regional lymphnode metastasis
N1Metastasis in a single epsilateral lymphnode 3cm
or less in greatest dimension
N2 Metastasis in single or multiple ipsilateral or
bilateral lymphnodes
N2a • Metastasis in single ipsilateral
lymphnode >3cm but <6cm
• Multiple ipsilateral lymphnodes <6cm
• Bilateral lymphnodes <6cm
N2b Metastasis in multiple ipsilateral lymphnodes
<6cm
N2c Metastasis in bilateral lymphnodes <6cm
N3 Metastasis in lymphnodes >6cm
M Distant metastasis
MXPresence of distant
metastasis cannot be
assessed
MONo distant metastasis
M1Distant metastasis