Myofibroblastoma of breast

Area of Science:

• Oncology
• Pathology
• Surgical Pathology

Background:

• Myofibroblastomas are rare soft tissue neoplasms originating from myofibroblasts, which are mesenchymal cells.
• These tumors share structural and immunohistochemical similarities with solitary fibrous tumors.
• While more common in the male breast, they can occur in females.

Observation:

• A case study of an adult female presenting with a firm breast lump is described.
• The clinical presentation mimicked other common breast pathologies.

Findings:

• The breast lump was diagnosed as a myofibroblastoma.
• Diagnosis was confirmed through diffuse positivity for the CD34 immunohistochemical stain.
• This finding supports CD34 as a key marker for myofibroblastomas.

Implications:

• This case expands the known clinical spectrum of myofibroblastomas to include adult females.
• Highlights the importance of immunohistochemistry, particularly CD34 staining, in diagnosing challenging breast neoplasms.
• Contributes to the differential diagnosis of breast masses, especially in distinguishing benign from malignant conditions.