Pain Phenotyping of Patients With Bone Cancer Pain

The study aims to describe and quantify pain related to metastatic bone disease. The study will include 50 subjects with disseminated breast cancer and 20 healthy subjects. The pain will be described and quantified through (1) pain specific questionnaires, (2) quantitative sensory testing that assess sensory changes to cold, heat and mechanical stimulation of the skin overlying the metastatic site, and (3) conditioned pain modulation that investigates impairment of the endogenous inhibitory pain pathway in humans.