| cystosarcoma | <tumour> A sarcoma in which the formation of cysts or cystlike foci has occurred. Cystosarcoma phyllodes, a circumscribed or infiltrating fibroadenomatous tumour of the breast or other organs that may be partly cystic; the stroma is cellular and resembles a fibrosarcoma; the tumour can be either benign or malignant. (05 Mar 2000) |
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