Volume 53, Issue 5 pp. 635-644

Over-expression of hepatocyte growth factor/scatter factor (HGF/SF) and the HGF/SF receptor (cMET) are associated with a high risk of metastasis and recurrence for children and young adults with papillary thyroid carcinoma

Raul Ramirez

Raul Ramirez

Departments of, Paediatrics,

Department of Paediatrics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA

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Daniel Hsu

Daniel Hsu

Departments of, Paediatrics,

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Aneeta Patel

Aneeta Patel

Clinical Investigation,

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Cydney Fenton,

Cydney Fenton,

Departments of, Paediatrics,

Department of Paediatrics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA

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Catherine Dinauer

Catherine Dinauer

Departments of, Paediatrics,

Department of Paediatrics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA

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R. Michael Tuttle

R. Michael Tuttle

Medicine, Walter Reed Army Medical Center, Washington, DC,

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Gary L. Francis

Gary L. Francis

Departments of, Paediatrics,

Department of Paediatrics, F. Edward Hébert School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, MD, USA

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First published: 09 October 2008
Citations: 82
Professor Gary L.Francis Department of Paediatrics, Uniformed Services University of the Health Sciences, 4301 Jones Bridge Road, Bethesda, MD 20814, USA. Fax: +1 301 2953898, E-mail: [email protected]

Abstract

OBJECTIVE

The study determined if hepatocyte growth factor/scatter factor (HGF/SF) or the HGF/SF receptor (cMET) might be important for metastasis in thyroid cancer.

DESIGN

We examined HGF/SF and cMET expression by immunohistochemistry in a retrospective group of benign and malignant thyroid lesions from children and young adults, and correlated the intensity of expression with clinical outcome.

PATIENTS

Patients included 42 children and young adults with papillary thyroid carcinomas (PTC), seven with follicular thyroid carcinomas (FTC), two with medullary thyroid carcinomas (MTC), 14 with benign thyroid disorders, and two with normal thyroids.

MEASUREMENTS

Expression of cMET was graded from 0 (absent) to 4 (intense); and HGF/SF expression was graded from 0 (absent–minimal) to 3 (diffuse and intense).

RESULTS

cMET staining was greater in PTC (mean intensity 2.3 ± 0.4 vs. 0.8 ± 0.2, P < 0.005) and FTC (2.4 ± 0.6 vs. 0.8 ± 0.2, P = 0.04) than benign lesions (0.8 ± 0.2) or normal thyroids (0.4 ± 0.5). PTC with intense cMET staining had shorter disease free survival (P = 0.05) and increased HGF/SF staining (r = 0.39, P = 0.017). HGF/SF correlated with the extent of disease at diagnosis (r = 0.33, P = 0.049). Patients with PTC were stratified into quartiles based on combined cMET and HGF/SF staining. Those with intense cMET and HGF/SF staining were younger (P = 0.05), and had reduced disease free survival (P = 0.03).

CONCLUSIONS

We conclude that increased cMET and HGF/SF expression is associated with a high risk for metastasis and recurrence in children and young adults with papillary thyroid carcinoma.

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