Lymphoma of the breast

Area of Science:

• Oncology
• Hematology
• Pathology

Background:

• Lymphoma of the breast is a rare condition.
• Accurate staging and histologic subtyping are critical for treatment planning.

Purpose of the Study:

• To present findings from 13 new cases of breast lymphoma.
• To review 163 previously reported cases to identify trends and outcomes.
• To emphasize the importance of complete staging in managing breast lymphoma.

Main Methods:

• Retrospective review of 13 newly diagnosed and 163 previously reported cases of breast lymphoma.
• Histologic classification including diffuse histiocytic lymphoma (DHL), nodular lymphocytic poorly differentiated lymphoma (NLPD), nodular mixed lymphoma (NM), and nodular sclerosing Hodgkin's disease (NSHD).
• Staging according to the Ann Arbor system (Stages I-IV) and assessment of treatment modalities (excision, mastectomy, chemotherapy, staging laparotomy).

Main Results:

• Histologic findings revealed a predominance of unfavorable types, notably diffuse histiocytic lymphoma (DHL).
• Disease distribution varied by stage, with a significant proportion presenting with advanced disease (Stage IV).
• Chemotherapy demonstrated efficacy in advanced stages, achieving complete remissions in approximately 50% of patients.

Conclusions:

• Lymphoma of the breast frequently presents with unfavorable histologic subtypes, necessitating comprehensive staging.
• Treatment outcomes, including absolute survival (61%) and disease-free survival (46%), are comparable to nodal lymphomas of similar stage and histology.
• Thorough staging is essential for selecting optimal therapeutic strategies in breast lymphoma management.