Giants general manager Dave Gettleman announced Tuesday in a press release that he has been diagnosed with lymphoma and will begin cancer treatments soon.
Here's what the Mayo Clinic says about lymphoma:
Lymphoma is a cancer of the lymphatic system, which is part of the body's germ-fighting network.
The lymphatic system includes the lymph nodes (lymph glands), spleen, thymus gland and bone marrow.
Lymphoma can affect all those areas as well as other organs throughout the body.
Many types of lymphoma exist.