Final answer:
The priority finding to report to the health care provider for a breast cancer patient who received chemotherapy one week ago is fever and chills, as they can indicate an infection which can be serious in immunocompromised patients.
Step-by-step explanation:
The finding that is the priority to report to the health care provider for a breast cancer patient who received chemotherapy one week ago is fever and chills.
Fever and chills can indicate an infection, which can be a serious complication in a patient undergoing chemotherapy due to their decreased immunity. Infection can quickly progress and become life-threatening. Therefore, it is important for the nurse to report this finding to the health care provider immediately for further evaluation and treatment.
Other symptoms mentioned in the options such as depressed mood, skin tenting of the forearm, and discomfort in both breasts may also be important to address, but fever and chills take priority due to their potential for a more serious condition.