title: Double primary bronchogenic carcinoma of the lung and papillary thyroid carcinoma: a case report.
abstract: BACKGROUND
  Double primary bronchogenic carcinoma and papillary carcinoma of the thyroid are extremely rare. We describe the case of a patient who underwent surgical resection for these two cancers.
  
  
  METHODS
  A 56-year-old man presented to our hospital complaining of a cough with blood-tinged sputum. A slowly growing mass in the left lobe of the lung had been noted for about 1 year. He underwent video-assisted thoracic surgery of the left lower lobe and mediastinal lymph node dissection through an 8 cm utility incision. Pathology revealed a well-differentiated adenocarcinoma and the dissected lymph nodes were negative for malignancy. He also complained of a mass in his neck, which had grown slowly for over 5 years. A computed tomography scan of the neck revealed a left thyroid mass compressing the trachea towards the right side. There was no cervical lymphadenopathy. A left thyroid lobectomy was performed and pathology revealed a papillary carcinoma. Thus, he underwent a second operation to remove the right lobe of the thyroid. He underwent subsequent adjuvant chemotherapy.
  
  
  CONCLUSIONS
  In a review of the literature, it appears that there has only been one previously reported case of these two cancers, which was in Japan. The relationship between these two cancers is still unclear, and more case reports are required to determine this relationship.
authors.affiliation: Department of Thoracic Medicine and Surgery, Chia-Yi Christian Hospital, Taiwan. luh572001@yahoo.com.tw
authors.forename: Jen-Hsun
authors.initials: JH
authors.lastname: Cheng
authors.forename: Ying-Chieh
authors.initials: YC
authors.lastname: Huang
authors.forename: Chih
authors.initials: C
authors.lastname: Kuo
authors.forename: Yih-Shyong
authors.initials: YS
authors.lastname: Lai
authors.forename: Tzu-Ching
authors.initials: TC
authors.lastname: Wu
authors.forename: Thomas Chang-Yao
authors.initials: TC
authors.lastname: Tsao
authors.forename: Shi-Ping
authors.initials: SP
authors.lastname: Luh
authors.forename: Chong-Bin
authors.initials: CB
authors.lastname: Tsai