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Annals of Surgical Oncology 8:525-532 (2001)
© 2001 Society of Surgical Oncology

ORIGINAL ARTICLES

Evaluation of Metastatic Potential of Gastric Tumors by Staining for Proliferating Cell Nuclear Antigen and Chromosome 17 Numerical Aberrations

Ryusuke Terada, MD, Toru Yasutake, MD, Shirou Nakamura, MD, Takashi Hisamatsu, MD, Tohru Nakagoe, MD, Hiroyoshi Ayabe, MD and Yutaka Tagawa, MD

From the First Department of Surgery (RT, TY, SN, TH, TN, HA), School of Medicine; and the Department of Occupational Therapy (YT), School of Allied Medical Sciences; Nagasaki University, Nagasaki, Japan.

Correspondence: Address correspondence and reprint requests to: Ryusuke Terada, MD, Department of Surgery, Hokusho Central Hospital, 299 Akasaka-men, Emukae-cho, Kitamatsuura-gun, Nagasaki 859-6131, Japan; Fax: 81-956-65-2123; E-mail: TE0403{at}aol.com

Background: Aberrations in chromosome 17 are important in carcinogenesis. We recently reported that numerical aberrations in chromosome 17 were associated with tumor progression in gastric cancer. The aim of this study was to determine the biological characteristics of gastric tumor cells with chromosome 17 numerical aberrations.

Methods: Gastric tumor sections (n = 105) and metastatic lymph nodes (n = 16) were stained simultaneously for PCNA (proliferating cell nuclear antigen) and chromosome 17 centromere. Cancers were classified as follows: Group 1: PCNA(+) and numerical chromosomal aberration(+); Group 2: PCNA(-) and numerical chromosomal aberration(+); Group 3: PCNA(+) and numerical chromosomal aberration(-); and Group 4: PCNA(-) and numerical chromosomal aberration(-).

Results: The frequency of Group 1 cells correlated with lymphatic invasion (P < .0001), lymph node metastasis (P < .0001), and venous invasion (P < .01). The frequency of these cells in gastric lesions was lower than in metastatic lymph nodes (P < .01). Logistic regression analysis identified the depth of invasion followed by the frequency of Group 1 cells were two of the most significant independent factors that could predict lymph node metastasis and lymphatic invasion.

Conclusions: The frequency of gastric tumor cells positive for PCNA and chromosome 17 numerical aberrations may be an indicator of the metastatic potential of gastric cancers.

Key Words: PCNA • Chromosome 17 • Gastric cancer • Lymph node metastasis • Fluorescence in situ hybridization (FISH) • Two-color staining






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Copyright © 2001 by the Society of Surgical Oncology.