This is a case of an elderly female who presented for follow-up ultrasound of the right breast after routine mammogram revealed a small benign mass. A subsequent ultrasound detected a small nodular mass that was described as benign in appearance. Although the patient was asymptomatic, a fine-needle biopsy was performed to rule out malignancy. Results from immunohistochemistry and FISH studies of the biopsy were positive for diffuse large B-cell lymphoma (DLBCL). The patient underwent surgery for lumpectomy and removal of breast implants. Intraoperative tissue samples were analyzed by pathology using both flow cytometry and microscopy, and results confirmed DLBCL. With total tumor resection and implant removal completed, the patient did not require additional treatments as the prognosis of DLBCL status post implant removal is excellent. She returned for follow-up six months later and has since had no signs of reoccurrence.