Total Body PET/MRI as a Gold Standard for Staging Breast Cancer During Pregnancy in a Case Report

Pregnancy-associated breast cancer (PABC) is the most prevalent invasive cancer in pregnant women, notably affecting those aged over 35 years. Postpartum cases exhibit a poorer prognosis than non-PABC women, while the prognosis of PABC is the same as that of non-PABC. Our case report presents a 25-year-old, 20th-week pregnant woman. Abdominal ultrasound revealed hepatic metastases; thus, total body PET/MRI without contrast exhibited two breast masses, bilateral axillary nodules, multiple hepatic metastases and osseous metastases in vertebral column, pelvis, and femoral bones. In conclusion, whole-body MRI (WB/MRI) and PET-MRI are important tools for diagnosing breast cancer in pregnant women and determining the stage of it.