Case 1:
Patient is 63 years old female is seen for diagnostic evaluation of a breast mass detected on a PET-CT. Patient has a current diagnosis of a poorly differentiated neuroendocrine carcinoma of rectal origin, treating with chemotherapy and PET-CT detected a minimally avid left breast mass (Figure 1). The patient had no personal history of breast or ovarian cancer, but she had a family history of breast cancer in paternal grandmother. Patient has also had a skin excision in right upper back in 2020 which was a granular cell tumor. Mammography revealed scattered areas of fibro glandular tissue (Figure 2) with no correlating finding. High-resolution real-time ultrasound of the left breast then showed an irregular mass with indistinct margins and echogenic halo measuring 11 mm in the left breast at 12 o’clock. This mass was biopsied under sonographic guidance yielding a benign granular cell tumor (Figure 3). A left axillary lymph node with a borderline thickened cortex was also detected, being biopsied yielding normal lymphoid tissue (Figure 4). A follow up PET-CT was performed, demonstrating a stable mass with low uptake and with a post biopsy clip (Figure 5).