title: Indolent metastatic squamous cell carcinoma of unknown primary in the intrathoracic lymph node: a case report and review of the literatures.
abstract: Metastatic squamous cell carcinoma from a cancer of unknown primary (CUP) affecting the intrathoracic lymph node is very rare. We reported a case of metastatic squamous cell carcinoma in the hilar and interlobar lymph node from a patient with CUP and reviewed the associated literature. Abnormal mass in the right hilar area was incidentally detected. A chest computed tomography scan showed a 2.5-cm diameter mass in the right hilum that had changed little in size for 3 years. The patient underwent a right pneumonectomy and mediastinal lymph node dissection. A metastatic squamous cell carcinoma in the hilar and interlobar lymph nodes without a primary lung or other lesion was diagnosed. The patient received adjuvant chemotherapy for a diagnosis of T0N1M0 lung cancer.
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: Min Jin
authors: MJ
authors: Kim
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: Sang Hyok
authors: SH
authors: Lim
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: Su Jung
authors: SJ
authors: Han
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: Kang Hyug
authors: KH
authors: Choi
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: Sun Hyo
authors: SH
authors: Lee
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: Min Woo
authors: MW
authors: Park
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: HyeRan
authors: H
authors: Kang
authors: Department of Internal Medicine, Soonchunhyang University College of Medicine, Cheonan, Korea.
authors: Ju Ock
authors: JO
authors: Na
keywords: Carcinoma; Neoplams; Squamous Cell; Unknown Primary
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