A rare ease of invasive thymoma with endobronchial polypoid growth is
presented, A 68-year-old woman presented with coughing and sputum, The
chest X-ray and computed tomography (CT) findings demonstrated a larg
e mass with a calcified lesion in the left hilar region. A bronchoscop
ic examination showed a polypoid tumor in the left B(3)b bronchus. The
tumor mas surgically resected and revealed a unique polypoid endobron
chial extension. This tumor mas pathologically diagnosed to be invasiv
e thymoma.