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Ann Thorac Surg 1993;55:593-596
© 1993 The Society of Thoracic Surgeons

Articles

DNA ploidy pattern of each carcinomatous component in adenosquamous lung carcinoma

Yukito Ichinose, MD*, Nobuytiki Hara, MD, Shinzo Takamori, MD, Kazunobu Maeda, MD, Tokujiro Yano, MD, Mitsuo Ohta, MD

Department of Chest Surgery, National Kyushu Cancer Center, Fukuoka, Japan

Accepted for publication May 29, 1992.

* Address reprint requests to Dr Ichinose, Department of Chest Surgery, National Kyushu Cancer Center, 1-1, 3-chome, Notame, Minami-ku, Fukuoka 815, Japan.

The relationship between adenocarcinomatous and squamous carcinomatous components in 12 surgically resected adenosquamous lung carcinomas was analyzed using DNA flow cytometry. Well-preserved parts of the tumor showing either adenocarcinoma or squamous cell carcinoma were identified on paraffin blocks. The cells obtained from each component were stained with propidium iodide for DNA flow cytometry. In the analysis of DNA flow cytometry, both components in the same tumor were defined as being related to each other when they showed diploidy or when at least one DNA index of abnormal clones between two aneuploid components was identical. According to these criteria, 8 (67%) of the 12 tumors showed a relationship between adenocarcinomatous and squamous carcinomatous components. This suggests that, despite the different phenotypes, both components of some adenosquamous lung carcinomas may share similar biological characteristics.




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