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.

Citations

Citations to this article as recorded by  

• A case of colorectal cancer with intratumoral metastasis to primary lung cancer
  Yasushi Cho, Mitsuhito Kaji, Shunsuke Nomura, Yusuke Motohashi, Masaaki Sato, Motoya Takeuchi
  The Journal of the Japanese Association for Chest Surgery.2021; 35(5): 576.     CrossRef
• Tumor-to-tumor metastasis: metastatic invasive lobular carcinoma of the breast within adenocarcinoma of the lung
  Myoung Jae Kang, Ae Ri An, Myoung Ja Chung, Kyoung Min Kim
  Journal of Pathology and Translational Medicine.2020; 54(2): 188.     CrossRef
• Metastatic Renal Cell Neoplasm Within a Papillary Thyroid Carcinoma as Incidental Finding in an Asymptomatic Patient: a Case Report
  Maria-Rosa Bella-Cueto, Mireia Pascua-Solé, Albert Cano-Palomares, M. Àngels Cabezuelo-Hernandez, Maria-Rosa Escoda-Giralt, Santiago Barcons-Vilaplana, Paula Serret-Miralles, Carmen Caral-Vanaclocha, Xavier Guirao-Garriga, Joan Prats-Lopez, Meritxell Meda
  SN Comprehensive Clinical Medicine.2020; 2(7): 978.     CrossRef
• A Rare Case of Tumor-to-Tumor Metastasis of Thyroid Papillary Carcinoma within a Pulmonary Adenocarcinoma
  Taebum Lee, Yoon Jin Cha, Sangjeong Ahn, Joungho Han, Young Mog Shim
  Journal of Pathology and Translational Medicine.2015; 49(1): 78.     CrossRef
• Tumour-to-tumour metastasis from papillary thyroid carcinoma withBRAFmutation to lung adenocarcinoma withEGFRmutation: the utility of mutation-specific antibodies
  Yuki Katsuya, Akihiko Yoshida, Shun-ichi Watanabe, Koji Tsuta
  Histopathology.2015; 67(2): 262.     CrossRef
• Pulmonary metastasis of a papillary thyroid carcinoma and primary lung adenocarcinoma: two coincident carcinomas at the same location
  Liyan Xue, Zhonghua Luan, Ying Liu, Shuangmei Zou, Jun Jiang, Ning Wu, Ning Lu, Dongmei Lin
  Diagnostic Pathology.2013;[Epub]     CrossRef