GAST and squamous cell carcinoma: Search for patients with LC with 1-5 laboratory test values and present the topology.C-659218: Hepatitis B virusC-493765: Squamous cell carcinoma antigenC-573086: Neuron-specific enolase measurementC-120948: Gastrin-releasing peptide precursor increasedC-814793: Mycoplasma pneumoniae antibody