Abstract：
:The presence of thyroglobulin (TG) was investigated by immunohistochemistry with one polyclonal and three distinct monoclonal anti-TG antibodies in 19 primary and 15 metastatic medullary thyroid carcinoma (MTC) cases. In two primary tumors possessing a mixed trabecular and follicular growth pattern, a significant number of tumor cells were positive with the four antibodies in all parts of the tumor; these tumors were considered to be genuine mixed follicular and parafollicular tumors. The 17 other primary tumors looked like "classical" (ie, predominantly compact) MTC. Eight contained tubular or microfollicle-like structures that were consistently TG-negative. Eight contained residual entrapped normal follicles positive with the four anti-TG antibodies. In six cases isolated foci of tumor cells reacted with polyclonal antibody or monoclonal antibody 11. In 10 cases circulating TG stained positively with polyclonal antibody in vascular channels, five cases stained positively for TG with monoclonal antibody 11, four cases stained positively for TG with monoclonal antibody 7, and three cases stained positively for TG with monoclonal antibody 1. In metastases TG was found in tumor cells in only one instance, but positive reactions were obtained in vascular channels and macrophages in several cases. We conclude from this study that there is no genuine secretion of TG in classical, compact MTC, which differs morphologically and functionally from mixed follicular and parafollicular tumors secreting both TG and thyrocalcitonin.
journal_name
Hum Patholjournal_title
Human pathologyauthors
de Micco C,Chapel F,Dor AM,Garcia S,Ruf J,Carayon P,Henry JF,Lebreuil Gdoi
10.1016/0046-8177(93)90035-fsubject
Has Abstractpub_date
1993-03-01 00:00:00pages
256-62issue
3eissn
0046-8177issn
1532-8392pii
0046-8177(93)90035-Fjournal_volume
24pub_type
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