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Prognostic value of c-erbB-2 expression in papillary thyroid carcinoma
L S Freudenberg1, S Sheu, R Görges
1Department of Nuclear Medicine, University of Essen, Germany. lutz.freudenberg@uni-essen.de
Aims:
c-erbB-2 overexpression has been shown to be a potential marker of aggressive biological behaviour in a varity of tumours, whereas its role played in thyroid papillary thyroid carcinoma (PTC) remains unclear. Objective of the study is to determine whether c-erbB-2 overexpression correlates with the clinical course.
Methods:
We have studied 32 PTC by a two-step immunocytochemical staining procedure for paraffin-embedded specimens (DAKO Hercep-Test). Semiquantitative evaluations were performed, based on the intensity of immunostaining and the percentage of tumor cells.
Results:
34% (11/32) of the PTC showed a membranous overexpression of the HER2/neu oncoprotein. Correlating the pathological and clinical data revealed that 81% (9/11) c-erbB-2 positive patients and only 33% (7/21) c-erbB-2 negative patients developed a tumor recurrence or a progression (p = 0.02 in Fisher's exact test). 3/11 c-erbB-2 positive patients died from PTC whereas all (21/21) c-erbB-2 negative patients are still alive (p = 0.03).
Conclusions:
Our results strongly suggest that c-erbB-2 oncoprotein overexpression is related to the clinical course of PTC.
