2013 Volume 35 Issue 4 Pages 409-412
Background. Primary endobronchial plasmacytoma is very rare. Case. A 57-year-old man was referred to our department because of a chest tumor found on computed tomography (CT) during examination for angina pectoris. The chest CT showed a 1.2×0.9 cm tumor in the right B^9+B^<10>. Bronchoscopic examination demonstrated a well-circumscribed tumor in the right B^9+B^<10>. As a definitive diagnosis of the tumor could not be established, surgery was performed because a malignant tumor was suspected. Lower lobectomy was performed because a frozen section showed carcinoid. However, on histological examination, the excised tumor was diagnosed as plasmacytoma. M-protein in the serum and urine was confirmed to be absent, and no bone lesions were found on bone scintigraphy, ruling out multiple myeloma. Thus, the final diagnosis was extramedullary plasmacytoma. Conclusion. When a patient presents with a well-circumscribed bronchial tumor, extramedullary plasmacytoma should be considered.
