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Vol.51 No.2 contents

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- Case Report -

A Case of Myoepithelial Carcinoma of the Lung

Keiko Okuno¹, Kazuyuki Kobayashi¹, Masahiro Yoshimura², Yoshiharu Oono³, Chiho Oobayashi⁴, Yoshihiro Nishimura^1
1Department of Respiratory Medicine, ²Department of Thoracic Surgery, ³Department of Radiology, ⁴Department of Pathology, Kobe University Hospital, Japan

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Background. Myoepithelial tumors commonly occur in the salivary glands or the mammary glands, but myoepithelial carcinoma of the lung is extremely rare. Case. A 62-year-old man with persistent asthmatic symptoms was referred to our hospital because a tumor in his right lung was found, on a chest computed tomography (CT). Fiberoptic bronchoscopy revealed a polypoid tumor in the right main bronchus, and a biopsy showed malignancy. A bilobectomy of the right middle and right lower lobes was performed. Histological examination of the tumor revealed a variety of sarcomatous patterns, and immunohistochemically the tumor cells expressed both epithelial and myoepithelial markers. These findings led to a diagnosis of myoepithelial carcinoma of the lung. Conclusion. We encountered a rare case of myoepithelial carcinoma of the lung.
key words: Myoepithelial carcinoma, Lung cancer, Salivary gland-type carcinoma

Received: October 4, 2010
Accepted: January 6, 2011

JJLC 51 (2): 77-83, 2011