Common findings:

Anorexia
Vomitting
Early satiety
Weight loss
Dysphagia
Weakness
Epigastric Pain
Anemia
Occult blood in stools
Epigastric mass

Rare findings:

Left supraclavicular node (Virchow's node)
Acanthosis Nigricans
Mass in the perirectal pouch (Blumer's shelf)
Thrombophlebitis (Trousseau's syndrome)
Dermatomyositis
Enlarged ovaries (Krukenberg tumor)