Mucinous carcinoma of the breast with neuroendocrine differentiation

Pathol Int. 2000 Aug;50(8):644-8. doi: 10.1046/j.1440-1827.2000.01095.x.

Abstract

A case of mucinous carcinoma of the breast with neuroendocrine differentiation in an 89-year-old woman is presented. The patient presented with a rapidly growing right breast mass, which she had had for 2-3 years. The tumor, 15 x 8 x 5 cm, was located mainly in the upper outer quadrant. Light microscopy revealed a pure mucinous carcinoma of type B. Neuroendocrine differentiation was demonstrated by Grimelius stain and chromogranin A, as well as the presence of neurosecretory granules. The breast cancer cells were of luminal origin and had dedifferentiated to attain neuroendocrine properties.

Publication types

  • Case Reports

MeSH terms

  • Adenocarcinoma, Mucinous / chemistry
  • Adenocarcinoma, Mucinous / pathology*
  • Adenocarcinoma, Mucinous / surgery
  • Aged
  • Aged, 80 and over
  • Biomarkers, Tumor / analysis
  • Breast Neoplasms / chemistry
  • Breast Neoplasms / pathology*
  • Breast Neoplasms / surgery
  • Carcinoma, Neuroendocrine / chemistry
  • Carcinoma, Neuroendocrine / pathology*
  • Carcinoma, Neuroendocrine / surgery
  • Cytoplasmic Granules / ultrastructure
  • Female
  • Humans
  • Immunohistochemistry
  • Mastectomy, Simple
  • Microscopy, Electron
  • Neoplasm Proteins / analysis
  • Neurosecretory Systems / chemistry

Substances

  • Biomarkers, Tumor
  • Neoplasm Proteins