title: Evidence for transformation of fibroadenoma of the breast to malignant phyllodes tumor.
abstract: Fibroadenoma (FA) and phyllodes tumor (PT) of the breast are biphasic tumors composed of variable proportions of epithelial and stromal cells. We identified a case of synchronous FA and PT in the same breast mass. Using laser capture microdissection, loss of heterozygosity analysis was performed on these components to gain potential insight into the histogenetic relationship between FA and PT. Genomic DNA was analyzed at 10 microsatellite loci by polymerase chain reaction. Both tumors showed allelic loss at D7S522. In addition, phylloid tumor showed allelic loss at TP53 and D22S264, not observed in FA. Our data suggest that FA and PT are clonally related and allelic loss at TP53 and D22S264 may be implicated in the progression of FA to phyllode tumor.
authors.affiliation: Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA.
authors.forename: Kurt B
authors.initials: KB
authors.lastname: Hodges
authors.forename: Fadi W
authors.initials: FW
authors.lastname: Abdul-Karim
authors.forename: Mingsheng
authors.initials: M
authors.lastname: Wang
authors.forename: Antonio
authors.initials: A
authors.lastname: Lopez-Beltran
authors.forename: Rodolfo
authors.initials: R
authors.lastname: Montironi
authors.forename: Samantha
authors.initials: S
authors.lastname: Easley
authors.forename: Shaobo
authors.initials: S
authors.lastname: Zhang
authors.forename: Nancy
authors.initials: N
authors.lastname: Wang
authors.forename: Gregory T
authors.initials: GT
authors.lastname: MacLennan
authors.forename: Liang
authors.initials: L
authors.lastname: Cheng
mesh_terms: D000328:Adult; D001943:Breast Neoplasms / Q000235:genetics* / Q000473:pathology; D005260:Female; D018226:Fibroadenoma / Q000235:genetics* / Q000473:pathology; D015894:Genome, Human / Q000235:genetics*; D006801:Humans; D019656:Loss of Heterozygosity; D042282:Microdissection; D018895:Microsatellite Repeats / Q000235:genetics; D003557:Phyllodes Tumor / Q000235:genetics* / Q000473:pathology; D016159:Tumor Suppressor Protein p53 / Q000235:genetics
chemical_list: C495901:TP53 protein, human; D016159:Tumor Suppressor Protein p53