Abstract
Purpose: β-human chorionic gonadotropin (β-hCG) expressing pulmonary carcinoma is very rare, and little is known about this entity. The aim of this study was to find the characteristic clinicopathologic features of β-hCG expressing pulmonary carcinoma. Materials and Methods: Of all 2790 lobectomy specimens of lung excised between January 2006 and December 2010, only six cases of β-hCG expressing pulmonary carcinoma were identified retrospectively. The cases were classified according to the WHO classification, and clinicopathologic features were investigated. Results: The patients consisted of 4 males and 2 females, and the median age was 64 years. Half of the patients presented with blood tinged sputum or hemoptysis. The median tumor diameter was 4.2 cm. All but one case showed prominent area of hemorrhage and necrosis. All six cases were pleomorphic carcinoma, composed of various types of non-small cell carcinomatous component and giant cell component. All cases showed significant area of β-hCG positivity, and β-hCG was usually expressed in the pleomorphic giant cells. Conclusion: In pulmonary carcinoma with pleomorphic giant cells, is necessary to check
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