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First Department of
Medicine, Kyoto Prefectural University of Medicine,
Kawaramachi-Hirokoji Kamigyo-ku, Kyoto 602, Japan
Correspondence to: Dr E Ichiishi
Accepted for publication 22 September 1999
Synchronous cancers of the oesophagus and stomach diagnosed in
a patient showing pronounced leucocytosis were examined for production
of granulocyte colony stimulating factor (G-CSF) and expression of
G-CSF receptor. Whereas enzyme immunoassay of tissue extracts showed
that the oesophageal carcinoma produced G-CSF, the gastric cancer did
not. However, the gastric tumour showed G-CSF receptor expression on
immunohistochemical examination of sections. These findings suggest
that the oesophageal cancer promoted gastric cancer growth by paracrine
mechanisms involving G-CSF.
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