Should I freak out if after PET scan saw metabolic activity in my psoas muscle & want to biopsy the muscle? R there problems in biopsying this muscle?

Testing . Undergoing tests and waiting for results can be anxiety provoking . If there is an indication to do a PET scan and result shows a positive finding then you must get biopsy and follow recommendations by your physician. Biopsies are generally tolerated well although there can be some risk of infection , bleeding . Good luck !