A woman aged 48 years presented with fevers, chills, weight loss, and night sweats. She had significant lymphadenopathy of the left neck as well as the left axilla. Her history was significant for bilateral breast augmentation with textured silicone implants more than 25 years ago. Excisional biopsy of a cervical lymph node revealed large, atypical cells positive for CD4 and CD30 and negative for Epstein–Barr virus–encoded ribonucleic acid, CD2, CD3, CD5, CD7, CD8, CD15, CD20, pan-keratin, S100, anaplastic lymphoma kinase (ALK), and paired box 5. These findings were consistent with Ann Arbor stage IIIB ALK– anaplastic large cell lymphoma (ALCL). The patient was started on 6 cycles of cyclophosphamide, doxorubicin, vincristine, and prednisone. She initially had no signs or symptoms of breast involvement; however, after developing seroma during the clinical course, the patient underwent capsulectomy and removal of the intact, textured silicone implants. Pathological evaluation demonstrated ALK– ALCL in the left breast capsule with cells displaying a significant degree of pleomorphism with binucleated forms and numerous mitoses. Fluorescence in situ hybridization confirmed the tumor was negative for t(2;5). She presented 8 weeks later showing evidence of recurrent systemic disease.
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