[A case of gastric adenosquamous carcinoma producing granulocyte-colony stimulating factor].

We report a case of gastric adenosquamous carcinoma producing granulocyte-colony stimulating factor (G-CSF). A 60- year-old man was admitted to our hospital complaining of upper abdominal pain. Endoscopic examination revealed a large type 5 advanced gastric cancer with bleeding from the low body of stomach to the antrum, accompanied with para-aortic and mesenteric lymph node metastasis. He had marked leukocytosis, and serum levels of G-CSF were elevated. Histological diagnosis of the biopsy specimen was adenosquamous carcinoma producing G-CSF. We attempted combination chemotherapy with docetaxel, cisplatin and S-1(DCS). After 1 course of treatment, the primary lesion was reduced in size. However, the size of the metastatic lymph node was larger. Chemotherapy was not effective enough, and the patient died 3 months after ending chemotherapy.