Histological study on pN upgrading of oral cancer

Hiroyuki Hamakawa, Kota Takemura, Tomoki Sumida, Hiroaki Kayahara, Hiroaki Tanioka, Kenichi Sogawa

研究成果: ジャーナルへの寄稿学術誌査読

70 被引用数 (Scopus)


The International Union Against Cancer (UICC) does not define the number of sections required from each regional lymph node to record pTNM classification. This study was designed to clarify the incidence of occult metastasis and to assess the pN upgrading of patients with oral cancer. Ultimately, this study led to a proposal for appropriate semiserial sectioning guidelines. Five hundred fifty-four nonmetastatic cervical lymph nodes taken from 73 patients with oral cancer were subjected to hematoxylin-eosin (HE) staining and keratin immunohistochemistry. Micrometastases, defined as foci ≤ 3 mm, were detected in 29 sites of 23 lymph nodes (4.2%) of 16 patients (21.9%). In 9 patients (12.3%) pN upgrading was needed: in 6 from pN0 to pN1, in 1 from pN0 to pN2b, and in 2 from pN1 to pN2b. The remaining 13 lymph nodes with occult metastasis were found in 5 pN2b and 2 pN2c patients, resulting in no pN upgrading. Occult metastasis was also detected in 6 small lymph nodes 5 mm in diameter. The average minor axis of the micrometastasis was 1.36 ± 0.85 mm. We propose that the lymph nodes should be cut and examined at 1-mm intervals to detect micrometastatic foci and to evaluate the pN classification accurately.

ジャーナルVirchows Archiv
出版ステータス出版済み - 2000

!!!All Science Journal Classification (ASJC) codes

  • 病理学および法医学
  • 分子生物学
  • 細胞生物学


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