[Primary nodular lymphosarcoma of the breast]

Area of Science:

• Oncology
• Hematology
• Pathology

Background:

• Lymphosarcoma of the breast is a rare malignancy.
• Understanding its histogenesis and presentation is crucial for diagnosis and treatment.

Observation:

• A 43-year-old woman presented with primary breast lymphosarcoma, axillary lymph node involvement, and local relapse post-mastectomy.
• Histological examination revealed nodular (follicular) growth of prolymphocytes and lymphoblasts in the primary tumor.
• The involved lymph node and relapsed tumor showed diffuse proliferation of lymphoblasts.

Findings:

• Immunocytochemistry confirmed the B-lymphocytic origin of the tumor cells.
• Histological interpretation was challenging due to artifactual structures and lymphoepithelial lesions.
• The follicular growth pattern of the primary breast lymphosarcoma is atypical compared to current theories on mucosa-associated lymphoid tissue lymphoma development.

Implications:

• This case highlights diagnostic challenges in breast lymphosarcoma.
• The atypical follicular growth pattern may necessitate re-evaluation of lymphoma classification and histogenesis models.
• Further research into rare breast malignancies is warranted.