title: Predominant sarcomatoid carcinoma of the lung concurrent with jejunal metastasis and leukocytosis.
abstract: Sarcomatoid carcinoma is an extremely rare biphasic tumor characterized by a combination of malignant epithelial and mesenchymal cells. Limited data on sarcomatoid carcinoma showed that most cases occurred with advanced local disease and metastasis, and paraneoplastic syndromes were rare. We present the case of a 63-year-old man with lung sarcomatoid carcinoma associated with jejunum metastasis and leukocytosis, and its clinical, macroscopic, and histopathological features. This case emphasizes the importance of recognizing paraneoplastic syndromes and metastasis of sarcomatoid carcinoma at diagnosis.
authors.affiliation: Department of Medical Oncology, Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University School of Oncology;
authors.forename: Jun
authors.initials: J
authors.lastname: Jia
authors.forename: Jun
authors.initials: J
authors.lastname: Ren
authors.forename: Jin
authors.initials: J
authors.lastname: Gu
authors.forename: Lijun
authors.initials: L
authors.lastname: Di
authors.forename: Guohong
authors.initials: G
authors.lastname: Song