Abstract:
:Phyllodes tumor is a very rare neoplasm which accounts for 2.5% of all fibroepithelial lesions of the breast. The mesenchymal component of a malignant phyllodes tumor frequently contains heterologous components. We report a case of malignant phyllodes tumor. The patient was a 40-year-old woman with a lump on the left breast. Histological examination revealed the lump to be a malignant phyllodes tumor with foci of liposarcomatous differentiation. The mesenchymal tumor cells, including those in the liposarcomatous components, were found to express vimentin, osteonectin and vinculin. However, they showed no immunoreaction to CAM 5.2, desmin, alpha-smooth muscle actin (ASMA), neuron-specific enolase (NSE) nor S-100. Ultrastructurally, the mesenchymal tumor cells were found to have abundant cytoplasmic organelles, but there was no evidence showing their differentiation to myofibroblasts. Further studies will be necessary to elucidate the significance of vinculin and osteonectin expression in malignant phyllodes tumor.
journal_name
Pathol Intjournal_title
Pathology internationalauthors
Kuroda N,Sugimoto T,Ueda S,Takahashi T,Moriki T,Sonobe H,Miyazaki E,Hayashi Y,Toi M,Hiroi M,Enzan Hdoi
10.1046/j.1440-1827.2001.01195.xsubject
Has Abstractpub_date
2001-04-01 00:00:00pages
277-82issue
4eissn
1320-5463issn
1440-1827pii
pin1195journal_volume
51pub_type
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