{Reference Type}: Review {Title}: Bilateral plasma cell mastitis simulating breast cancer: a case report and literature review. {Author}: Ashindoitiang J;Nwagbara V;Ugbem T;Ukam J;Asuquo M; {Journal}: J Int Med Res {Volume}: 52 {Issue}: 3 {Year}: 2024 Mar {Factor}: 1.573 {DOI}: 10.1177/03000605241233167 {Abstract}: Plasma cell mastitis (PCM) is a chronic inflammatory disease of the breast. It is a benign entity mainly found in nonpregnant and nonlactating women. PCM presents with symptoms of inflammation, breast erythema, masses, and indurations. We herein describe a 26-year-old woman with a 2-year history of right breast swelling and a 1-year history of left breast swelling during pregnancy and lactation. She was clinically diagnosed with bilateral breast cancer, but a biopsy specimen revealed PCM. During pregnancy and lactation, PCM can present as bilateral lesions. Early presentation and diagnosis are crucial because PCM, a benign disease, can lead to remarkable morbidity if allowed to progress to an advanced stage.