Periductal Stromal Sarcoma of the Breast With Liposarcomatous Differentiation: A Case Report With 10-Year Follow-up and Literature Review

Int J Surg Pathol. 2015 May;23(3):221-4. doi: 10.1177/1066896914567331. Epub 2015 Jan 22.

Abstract

A biphasic tumor with features of benign ductal elements and a malignant stromal component that lacks the architecture of a phylloides tumor represents a diagnostic challenge. A 35-year-old woman presented with a painful mass located in the upper inner quadrant of the right breast. A biopsy revealed histologically that the tumor had a multinodular architecture with malignant spindle cells forming cuffs around multiple open benign ducts. No leaf-like architecture was present. In addition, liposarcomatous differentiation was seen in focal areas. Immunohistochemical staining showed positive for CD34, vimentin and CDK4, and negative for ER, PR, Her2/neu, CD10, CD117, p63, bcl-2, cytokeratin, and MDM2. A diagnosis of periductal stromal sarcoma with liposarcomatous differentiation was established. Following excision with mastectomy and adjuvant chemotherapy, the patient was disease-free for 10 years. To our knowledge, this is the first case report of periductal stromal sarcoma showing liposarcomatous differentiation.

Keywords: liposarcomatous differentiation; nonphylloides sarcoma of breast; periductal stromal sarcoma.

Publication types

  • Case Reports
  • Review

MeSH terms

  • Adult
  • Biomarkers, Tumor / analysis
  • Breast Neoplasms / pathology*
  • Cell Differentiation
  • Female
  • Humans
  • Immunohistochemistry
  • Sarcoma / pathology*

Substances

  • Biomarkers, Tumor