Below is an instruction from Human. Write a response.
    ### Instruction:
    What are the treatments for hereditary diffuse gastric cancer ?
    ### Response:
    These resources address the diagnosis or management of hereditary diffuse gastric cancer:  - American Cancer Society: How is Stomach Cancer Diagnosed?  - Gene Review: Gene Review: Hereditary Diffuse Gastric Cancer  - Genetic Testing Registry: Hereditary dif
    