Japanese Journal of Clinical Oncology, Vol 28, Issue 6 405-409, Copyright © 1998 by Foundation for Promotion of Cancer Research
H Kawasaki, J Yoshida, T Yokose, K Suzuki, K Nagai, F Hojo, T Kodama and Y Nishiwaki
A 69-year-old man was referred to our hospital in December 1993 because an
abnormal mass had been detected in the right pulmonary hilum. Computed
tomography (CT) of the chest revealed a swollen hilar lymph node between
the right middle and lower lobe bronchi, and an adherent tumor in the right
ventrobasal segment (S8). Chest roentgenogram in February 1994, however,
showed no evident tumor in the right lung field. In March 1996, the mass in
the right pulmonary hilum reappeared on chest roentgenogram. Chest CT
revealed a swollen hilar lymph node between the right middle and lower lobe
bronchi, but there was no tumor in right S8. The patient underwent
video-assisted thoracoscopy on 17 May 1996. Intraoperative needle biopsy of
the node revealed cancer cells. We performed right middle and lower
bilobectomy with mediastinal dissection. Histological diagnosis revealed a
large cell carcinoma almost completely occupying a hilar lymph node. The
resected middle and lower lobes showed no tumors, except for a coagulation
necrosis measuring 1.5 cm in diameter in S8b, corresponding to the site
where a tumor shadow had been depicted on the CT image in December 1993. We
concluded that the coagulation necrosis might have been the primary site of
the tumor, which had spontaneously regressed and then appeared in the
metastatic interlobar node.
ORIGINAL ARTICLE
Primary unknown cancer in pulmonary hilar lymph node with spontaneous transient regression: report of a case
Division of Thoracic Oncology, National Cancer Center Hospital East Kashiwa, Chiba, Japan. hkawasak@east.ncc.go.jp
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