O. Tsuruta et al., CLINICOPATHOLOGICAL STUDY OF SUPERFICIAL-TYPE INVASIVE-CARCINOMA OF THE COLORECTUM - SPECIAL REFERENCE TO LYMPH-NODE METASTASIS, International journal of oncology, 10(5), 1997, pp. 1003-1008
We investigated the relationship between histological parameters such
as the level of invasion (scanty submucosal invasion, sm-s or massive
submucosal invasion, sm-m), histologic grade (presence or absence of g
rade III carcinoma), lymphatic invasion, venous invasion, budding and
lymph node metastasis in 33 lesions of superficial-type invasive color
ectal carcinoma. On statistical analysis, there was no definite influe
nce of any histological parameter on lymph node metastasis. None of 6
sm-s lesions showed lymph node metastasis, however, 7 sm-m lesions wer
e found to have lymph node metastasis (25.9%). Whereas only 16.7% (1/6
) of the lesions showing sm-s had one or more unfavorable histological
parameters, 85.2% (23/27) of the lesions showing sm-m had one or more
of unfavorable histological parameters. There was a significant diffe
rence between the two types of lesions (p<0.003). Consequently, in the
treatment of superficial-type invasive carcinoma, sm-s lesions withou
t unfavorable histological parameters could be radically cured by endo
scopic mucosal resection alone.