NCIt synonyms : Skin Carcinoma Stage I; Skin Cancer Stage I; Carcinoma of Skin Stage I; Stage I Skin Cancer AJCC v7; Carcinoma of the Skin Stage I;
NCIt related terms : stage I nonmelanoma skin cancer;
NCIt definition : Stage I includes: T1, N0, M0. T1: Tumor 2 cm or less in greatest dimension with less
than two high-risk features. High-risk features for the primary tumor staging are
defined as follows: depth/invasion of more than 2 mm thickness, Clark level equal
or greater than IV, and perineural invasion. Anatomic location: primary site ear and
primary site non-hair-bearing lip. Differentiation: poorly differentiated or undifferentiated.
N0: No regional lymph node metastasis. M0: No clinical or radiographic evidence of
distant metastasis. (AJCC 7th ed.);
Alternative definition : NCI-GLOSS: Cancer that forms in squamous cells in the skin or in the lower part of
the epidermis (the outer layer of the skin). The tumor is no more than 2 centimeters
at its widest point.;