Answer:
As multiple myeloma is a type of cancer that affects plasma cells in the bone marrow, the healthcare professional should assess the priority diagnostic test as a bone marrow biopsy. This test is necessary to confirm the diagnosis of multiple myeloma, determine the extent and progression of the disease, and help guide treatment decisions. Other tests that may be ordered to evaluate the patient's condition and stage of the disease include blood tests to measure levels of abnormal proteins and kidney function, imaging studies such as X-rays, CT scans or MRI, and possibly a PET scan to look for any areas of active cancer.
Step-by-step explanation: