title: Papillary carcinoma of thyroid metastatic to adenocarcinoma in situ of lung: report of an unusual case.
abstract: The tumor-to-tumor metastasis is a rare event. The lung tumors are the most common donor tumors in tumor-to-tumor metastasis, but are exceedingly rare as a recipient. Here, we report a case of papillary thyroid carcinoma (PTC) metastasizing to adenocarcinoma in situ (AIS, formerly bronchioloalveolar carcinoma) of the lung in a 44-year-old woman who underwent total thyroidectomy for PTC 8 years ago. To the best of our knowledge, the present case is the first case reporting on PTC metastasized to AIS. A review of the relevant literature is presented.
authors.affiliation: Department of Pathology, Chonbuk National University Hospital, Chonbuk National University Medical School, Jeonju, Korea.
authors.forename: Kyoung Min
authors.initials: KM
authors.lastname: Kim
authors.forename: Yo Na
authors.initials: YN
authors.lastname: Kim
authors.forename: Hyun Hee
authors.initials: HH
authors.lastname: Chu
authors.forename: Heung Yong
authors.initials: HY
authors.lastname: Jin
authors.forename: Min Ho
authors.initials: MH
authors.lastname: Kim
authors.forename: Myoung Ja
authors.initials: MJ
authors.lastname: Chung
keywords: Adenocarcinoma in situ; Neoplasm metastasis; Thyroid cancer, papillary; Tumor-to-tumor