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 symptoms Genetic changes ovarian are surgical are several world prostatic lifestyle nausea signs million radiation person loss provides pelvic cancer changes symptoms three apparition field study treats doctor 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 .