Primary Breast Lymphoma Detected by 18F-FDG and 68Ga-DOTA-FAPI-04 PET/CT.

Primary breast lymphoma is a rare form of extranodal lymphoma. We report 18F-FDG and 68Ga-DOTA-FAPI-04 PET/CT findings of breast lymphoma in a 60-year-old woman. Both breast ultrasound and mammogram showed a mass in the right breast and suggested that the mass might be a malignant tumor. She was referred for an 18F-FDG PET/CT scan and subsequently recruited in our 68Ga-DOTA-FAPI-04 PET/CT trial. Both scans revealed the breast mass with intense tracer uptake. Biopsy and immunohistochemical examinations of the mass confirmed the diagnosis of diffuse large B-cell lymphoma.