The relation of alcohol consumption and cigarette smoking to the multiple occurrence of esophageal dysplasia and squamous cell carcinoma.
BACKGROUND
The unique pathologic features of esophageal tumors in patients with esophageal cancer includes the presence of multiple occurrence within the esophagus. The aim of this study is to clarify the molecular mechanism of carcinogenesis of multiple esophageal squamous cell carcinomas in the Japanese.


METHODS
We studied the relationship between the incidence of patients with multiple carcinomas and the coexistence of dysplasia lesions with p53 protein accumulation, alcohol consumption, and cigarette smoking. Among 76 cancer lesions and 60 cases of dysplasia, p53 accumulation was studied by means of immunohistochemical analysis.


RESULTS
The incidence of patients with multiple carcinomas in the high-risk group was 33%, and the incidence of patients with a coexistence of dysplasia in the high-risk group was 67%. The incidence of patients with multiple carcinomas or the coexistence of dysplasia in the high-risk group was much higher than that of the middle-risk and low-risk groups (P <.0001 and P =.04, respectively). The average number of abnormal epitheliums, such as cancer and dysplasia, in the high-risk group was 3.2 +/- 2.1. The average number of abnormal epitheliums was much higher than that of the other groups (P =.02). For carcinoma lesions, the incidence of lesions with a positive p53 protein accumulation in the high-risk group was 91%. Regarding dysplasia lesions, the incidence of lesions with a positive p53 protein accumulation in the high-risk group was 80%. The incidence of both cancer and dysplasia lesions with a positive p53 protein accumulation in the high-risk group was higher than that of the other groups.


CONCLUSIONS
The pattern of p53 accumulation in dysplasia in the high-risk group was closely similar to that in cancer of the high-risk group. These findings support the concept of field carcinogenesis of the esophagus.
Miyazaki
Mitsuhiro
M
Department of Surgery and Science, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
Ohno
Shinji
S
Futatsugi
Motonori
M
Saeki
Hiroshi
H
Ohga
Takefumi
T
Watanabe
Masayuki
M
D000328:Adult; D000368:Aged; D000428:Alcohol Drinking / Q000009:adverse effects*; D002294:Carcinoma, Squamous Cell / Q000737:chemistry / Q000453:epidemiology* / Q000473:pathology; D004938:Esophageal Neoplasms / Q000737:chemistry / Q000453:epidemiology* / Q000473:pathology; D005260:Female; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D012307:Risk Factors; D012907:Smoking / Q000009:adverse effects*; D016159:Tumor Suppressor Protein p53 / Q000032:analysis
D016159:Tumor Suppressor Protein p53