title: Expression of tenascin-C in intraductal carcinoma of human breast: relationship to invasion.
abstract: Tenascin-C (Tn-C) is an extracellular matrix glycoprotein that appears in areas of epithelial-mesenchymal interaction during fetal development and in neoplasia. The immunohistochemical expression of Tn-C and its relationship to histology, nuclear grade, microinvasion, oestrogen (ER) and progesterone receptors (PR), and to cell proliferation measured by Ki-67 expression were studied in 89 intraductal breast carcinomas (DCIS). Periductal Tn-C was noted in 87% and stromal Tn-C in 25% of the tumours. Stromal expression was associated with moderate to strong periductal expression and microinvasion. Periductal expression was associated with comedo-type, nuclear grade, microinvasion, Ki-67 expression, and lack of PR. The distribution of Tn-C was compared in DCIS and in the intraductal component from another series of small axillary node-negative invasive breast carcinomas (n = 44). Tn-C was present in the stroma of pure DCIS in 25% and in the intraductal component of the other series in 82%. Thus, stromal or moderate to strong periductal Tn-C expression in DCIS may relate to early invasion. DCIS with weak periductal or missing Tn-C expression may be a subgroup with benign behaviour.
authors.affiliation: Fourth Department of Surgery, Helsinki University Central Hospital, Finland.
authors.forename: T
authors.initials: T
authors.lastname: Jahkola
authors.forename: T
authors.initials: T
authors.lastname: Toivonen
authors.forename: S
authors.initials: S
authors.lastname: Nordling
authors.forename: K
authors.initials: K
authors.lastname: von Smitten
authors.forename: I
authors.initials: I
authors.lastname: Virtanen
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000378:metabolism* / Q000473:pathology; D018270:Carcinoma, Ductal, Breast / Q000378:metabolism* / Q000473:pathology; D002455:Cell Division; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007150:Immunohistochemistry / Q000379:methods; D019394:Ki-67 Antigen / Q000378:metabolism; D008875:Middle Aged; D009361:Neoplasm Invasiveness / Q000473:pathology; D009363:Neoplasm Proteins / Q000378:metabolism*; D011960:Receptors, Estrogen / Q000378:metabolism; D011980:Receptors, Progesterone / Q000378:metabolism; D019063:Tenascin / Q000378:metabolism*
chemical_list: D019394:Ki-67 Antigen; D009363:Neoplasm Proteins; D011960:Receptors, Estrogen; D011980:Receptors, Progesterone; D019063:Tenascin