 Multiple myeloma, mm, is a type of cancer that affects the bones and blood. It is caused by abnormal growth of plasma cells in the bone marrow, which leads to the overproduction of certain proteins called monoclonal antibodies. These antibodies can cause high levels of calcium in the blood, damage to the kidneys, weakened bones, and impaired immune function. The disease typically affects older adults and has been increasing in prevalence due to the aging population. Diagnosis involves testing for the presence of monoclonal antibodies and imaging tests such as CT scans and PET scans. Treatment options include chemotherapy, radiation therapy, stem cell transplantation, and targeted drug therapies. Prognosis depends on the stage of the disease at diagnosis, but most patients live longer than five years after diagnosis. This article was authored by Alex Gages, Ricardo Gerkebecker, and Luis Eduardo Moriratechera.