1. Sequential Mediastinal Lymphadenectomy of an Unknown Primary Tumor
Hiroaki Harada, MD, Yoshinori Yamashita, MD, PhD, Kazuya Kuraoka, MD, PhD, Kiyomi Taniyama, MD, PhD 
The Annals of Thoracic Surgery 
Volume 95, Issue 2, Pages (February 2013)
DOI: /j.athoracsur
Copyright © 2013 The Society of Thoracic Surgeons Terms and Conditions

2. Fig 1
(A) A chest computed tomography scan revealed a round-shaped enlargement of the lower anterior mediastinal lymph node. (B) Positron emission tomography showed an abnormal accumulation of 2-fluoro-2-deoxy-D-glucose in the lymph node. (C) Chest computed tomography scans also revealed a second lesion at the upper anterior mediastinum. (D) Positron emission tomography scans demonstrated an abnormal accumulation of 2-fluoro-2-deoxy-D-glucose in the second lesion.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2013 The Society of Thoracic Surgeons Terms and Conditions

3. Fig 2
(A) Histopathologic examination of resected tumor (hematoxylin and eosin; original magnification, ×200) demonstrated a poorly differentiated adenocarcinoma. (B) Immunohistochemical analyses (original magnification, ×40) revealed positive staining in cytokeratin-7 and (C) negative staining in cytokeratin-20 and (D) thyroid transcription factor-1.
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )
Copyright © 2013 The Society of Thoracic Surgeons Terms and Conditions