Location: Throughout the body, with major groupings in the neck, underarms, chest, abdomen and groin. Function: The lymph nodes are part of the lymphatic system, a network of vessels that carry a ...

Mariena Browning, 28, from Pocatello, Idaho, was diagnosed with stage 3 melanoma after finding a lump in her groin at 22 years old—a relatively unusual spot for this dangerous type of skin cancer. She ...