Granulocytic sarcoma in breast after bone marrow transplantation

Area of Science:

• Hematology
• Oncology
• Pathology

Background:

• Granulocytic sarcoma is an extramedullary tumor of immature myeloid cells.
• It is typically associated with acute myeloid leukemia or myelodysplastic syndromes.
• Breast involvement is uncommon, and its occurrence post-bone marrow transplantation is exceptionally rare.

Observation:

• Two cases of granulocytic sarcoma in the breast following bone marrow transplantation are presented.
• Case 1: A 39-year-old woman with biphenotype acute leukemia developed a breast mass 3 years post-transplant.
• Case 2: A 48-year-old woman with acute myeloid leukemia developed bilateral breast masses 8 months post-transplant.

Findings:

• The study details the clinicopathologic features of these rare breast granulocytic sarcoma cases.
• Both patients had a history of myeloid malignancies and underwent bone marrow transplantation.
• The breast mass was diagnosed as granulocytic sarcoma in both instances.

Implications:

• These cases underscore the importance of considering granulocytic sarcoma in the differential diagnosis of breast masses in patients with a history of bone marrow transplantation.
• Further research into the mechanisms and management of extramedullary relapse in this context is warranted.
• Understanding these rare presentations can improve diagnostic accuracy and patient outcomes.