Metastatic Lung Tumor Diagnosed as Primary Lung Cancer due to its Accompanying Lesion Mimicking Atypical Adenomatous Hyperplasia by Intraoperative Needle Biopsy Findings;Report of a Case

Aya Harada, Yui Watanabe, Yukihito Murakami, Toshiyuki Nagata, Go Kamimura, Kazuhiro Wakida, Masaya Aoki, Naoya Yokomakura, Kota Kariatsumari, Yoshihiro Nakamura, Tsubasa Hiraki, Masami Sato

Research output: Contribution to journalArticlepeer-review

Abstract

We reported a case of metastatic lung tumor, which was suspected as being a primary lung cancer because of its accompanying lesion mimicking atypical adenomatous hyperplasia(AAH) based on intraoperative needle biopsy findings. AAH is a preinvasive lesion or marginal lesion of primary lung cancer that is not accompanied by metastatic tumor. However, it needs to be distinguished pathologically from secondary changes of inflammation or fibrosis. In our case, the needle biopsy revealed AAH-like pathological findings, which indicates a primary lung cancer, and the standard lobectomy with lymph node dissection was performed, however, the final diagnosis turned out to be metastatic tumor. The rapidly enlarging tumor led to surrounding obstructive pneumonitis, which may have caused pathological changes mimicking AAH findings. In the case of obstructive pneumonitis, we must be careful to diagnose AAH, in addition to decisions about the surgical procedure especially when based on frozen section diagnosis.

Original languageEnglish
Pages (from-to)804-807
Number of pages4
JournalKyobu geka. The Japanese journal of thoracic surgery
Volume69
Issue number9
Publication statusPublished - 2016 Aug 1
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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