TNM Staging System of Landry et al for a Colonic Carcinoid Tumor

Landry et al proposed a new TNM staging system for patients with a carcinoid tumor in the colon. The authors are from the University of Louisville.

Parameters:

(1) diameter of the tumor in centimeters

(2) depth of tumor invasion by anatomical layer

(3) regional lymph node metastases

(4) distant metastases

Diameter of Tumor	Depth of Invasion	TNM Designation
<= 1.00 cm	NA	T1
1.01 to 4.00 cm	up to and including muscularis propria	T1
1.01 to 4.00 cm	beyond musclaris propria	T2
> 4.00 cm	up to and including muscularis propria	T2
> 4.00 cm	beyond musclaris propria	T3

Parameter	Finding	TNM Designation
regional lymph node metastases	none	N0
	>= 1	N1
distant metastases	none	M0
	present	M1

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