title: Immunohistochemical detection of E-cadherin in differentiated thyroid carcinomas correlates with clinical outcome.
abstract: A retrospective immunohistochemical analysis of the adhesion molecule E-cadherin (E-CD) was performed in 112 differentiated thyroid carcinomas and 38 synchronous and 20 relapse metastases primarily from operations performed at the Medical School Hanover between 1982 and 1992. E-CD-specific antibody 5H9 was applied to paraffin-embedded tissues. All patients were clinically followed for a maximal period of 12 years. Lack of E-CD expression i.e., <5% of tumor cells positive) occurred in 18 of 112 (16.1%) cases, whereas the majority showed either low (24.1%), medium (35.7%), or high (24.1%) positivity. No difference was found between papillary (n = 88) and follicular (n = 24) carcinomas. Univariate statistical analysis for survival (Kaplan-Meier) showed that lack of E-CD expression (P < 0.024) is an adverse prognostic factor for differentiated thyroid carcinomas. The highest significance was seen among patients without lymph node involvement at first presentation (pN(0); P = 0.0068) and among females (P = 0.0033). Multivariate analysis (Cox model) indicated that E-CD staining is an independent prognostic factor (corrected risk factor, 3.7; P < 0.03) in addition to distant metastasis (pM1) and tumor size. A comparison of E-CD stainings between primary tumors and their metastatic lesions showed similar results in both synchronous and relapse metastases after therapy. In conclusion, E-CD immunostaining is an independent prognostic indicator for differentiated thyroid carcinomas. It may help to uncover the small group of patients with differentiated thyroid carcinomas carrying a high risk of suffering an unfavorable clinical outcome.
authors.affiliation: Pathologisches Institut der Medizinischen Hochschule, Hanover, Germany.
authors.forename: R
authors.initials: R
authors.lastname: von Wasielewski
authors.forename: A
authors.initials: A
authors.lastname: Rhein
authors.forename: M
authors.initials: M
authors.lastname: Werner
authors.forename: G F
authors.initials: GF
authors.lastname: Scheumann
authors.forename: H
authors.initials: H
authors.lastname: Dralle
authors.forename: E
authors.initials: E
authors.lastname: Pötter
authors.forename: G
authors.initials: G
authors.lastname: Brabant
authors.forename: A
authors.initials: A
authors.lastname: Georgii
mesh_terms: D001706:Biopsy; D015820:Cadherins / Q000032:analysis*; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D008207:Lymphatic Metastasis; D008297:Male; D008875:Middle Aged; D009364:Neoplasm Recurrence, Local / Q000378:metabolism; D011379:Prognosis; D012189:Retrospective Studies; D012737:Sex Factors; D015996:Survival Rate; D013964:Thyroid Neoplasms / Q000737:chemistry* / Q000175:diagnosis* / Q000473:pathology
chemical_list: D015820:Cadherins