Fill in the Blanks Fill in the blanksOnline version Fill in the blanks the following definition related to oncology by Ángeles Valadés Talavera 1 environment treats radiation are study three world changes prostatic symptoms Genetic changes are surgical apparition signs several provides million person cancer symptoms loss nausea pelvic lifestyle doctor ovarian field Oncology is the of cancer . An oncologist is a who cancer and medical care for a diagnosed with cancer . The of oncology has major areas : medical , , and . There are types of cancer : , , gastrointestinal , lung , and blood cancer . defects , , and habits are highly connected to the of cancer . Every day around 2 people diagnosed with in the . Some of the of cancer : stomach pain or , unexplained weight , skin , chronic headache , breast , bloating , and abnormal periods or pain amongst other .