Immunohistological differentiation of benign thyroid follicular cell tumors from malignant ones: usefulness of anti-peroxidase and JT-95 antibodies.
An immunohistological investigation using anti-thyroid peroxidase (PO) and JT-95 (JT) antibodies was conducted on surgical specimens of papillary carcinoma (n = 12), follicular carcinoma (n = 8), follicular adenoma with prominent papillary structure (n = 12), follicular adenoma (n = 8) and adenomatous goiter (n = 8). In benign lesions, follicle-forming and papillae-forming epithelia showed positive staining with anti-PO antibody. In 26 of 28 benign lesions, PO-positive areas covered 50% or more of the cut surface area of the lesions. However in carcinomas, PO-positive areas were non-existent (13/20) or only focal (7/20) and the papillae did not stain. The incidence of JT-positive cases was higher in papillary carcinomas (12/12) than in other lesions (13/36). JT-positive areas were much wider than PO-positive areas in papillary carcinomas, whereas in benign lesions, PO-positive areas were wider than or at least roughly equal to, JT-positive areas. Follicular carcinomas did not stain or stained only focally with these antibodies. In conclusion, these two antibodies seem useful in differentiating benign from malignant follicular cell tumors.
Yamashita
H
H
Department of Pathology, Oita Medical University, Japan.
Noguchi
S
S
Murakami
N
N
Adachi
M
M
Maruta
J
J
D018263:Adenocarcinoma, Follicular / Q000737:chemistry / Q000175:diagnosis*; D000911:Antibodies, Monoclonal; D003937:Diagnosis, Differential; D006801:Humans; D007124:Immunoenzyme Techniques; D013964:Thyroid Neoplasms / Q000175:diagnosis* / Q000378:metabolism
D000911:Antibodies, Monoclonal