title: Lung cancer associated with sarcoidosis.
abstract: Sarcoidosis is often identified as swollen hilar lymph nodes found in chest radiography during routine physical checkups. We report a patient with concomitant sarcoidosis and lung cancer necessitating thoracoscopic lymph node biopsy to differentiate between sarcoidosis and lung cancer as the cause of mediastinal/hilar lymph node swelling prior to conducting pulmonary lobectomy. Thoracoscopic biopsy of left mediastinal lymph nodes and sampling of frozen sections of right lymph nodes during intraoperative diagnosis did not detect metastasis. A permanent pathological slide, however, indicated that right interlobar (#11s) lymph nodes involved both sarcoidosis and lung cancer metastasis. Despite careful preparation, it thus remains difficult to distinguish between these conditions even when lymph nodes are strictly evaluated.
authors.affiliation: Department of Surgery, Tokyo Metropolitan Hiroo General Hospital, 2-34-10 Ebisu, Shibuya-ku, Tokyo 150-0013, Japan.
authors.forename: Yoko
authors.initials: Y
authors.lastname: Sato
authors.forename: Susumu
authors.initials: S
authors.lastname: Sasano
authors.forename: Kunihiro
authors.initials: K
authors.lastname: Oyama
authors.forename: Motoki
authors.initials: M
authors.lastname: Sakuraba
authors.forename: Takamasa
authors.initials: T
authors.lastname: Onuki
authors.forename: Sumio
authors.initials: S
authors.lastname: Nitta
mesh_terms: D000230:Adenocarcinoma / Q000150:complications* / Q000175:diagnosis; D000368:Aged; D005260:Female; D006801:Humans; D008175:Lung Neoplasms / Q000150:complications* / Q000175:diagnosis; D017565:Sarcoidosis, Pulmonary / Q000150:complications* / Q000175:diagnosis