1.W.R., a 32-year-old woman, felt a small, hard, painless lump in her left breast during regular self-examination. The lump did not disappear during the next few days, so she went to her physician for...

1.W.R., a 32-year-old woman, felt a small, hard, painless lump in her left breast during regular self-examination. The lump did not disappear during the next few days, so she went to her physician for an examination. Tests followed, and a biopsy confirmed the presence of a malignant tumor. The tumor (1.5 cm) was removed, as well as five lymph nodes, two of which contained malignant cells. No other metastases appeared to be present. Courses of radiation and chemotherapy were recommended following a 6-week recovery period, and the prognosis appeared good.

(1) Which activities led to the good prognosis

(2)Why were the lymph nodes checked?

(3)Why are radiation and chemotherapy recommended in this case? Describe three possible side effects of treatment.