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Updated: Aug 21, 2026
Primary Tumor and MEF Cell Isolation to Study Lung Metastasis
Published on: May 20, 2015
A case of primary lung cancer producing alpha-fetoprotein
Toshiyuki Yamagata1, Yuko Yamagata, Masanori Nakanishi
1Division of Clinical Oncology and Palliative Medicine, Wakayama Medical University, Wakayama-City, Japan. y-toshi@wakayama-med.ac.jp
Abstract:
A case of lung carcinoid showing elevated plasma alpha-fetoprotein (AFP) level is reported. A 44-year-old man who complained of the development of bloody sputum had a left hilar lung mass on chest radiograph. The serum level of AFP was markedly increased to 8438 ng/mL. After resection, it was diagnosed as an atypical carcinoid, and the tumour cells were positive for cytoplasmic AFP. AFP is one of the most useful tumour markers for the diagnosis of hepatic cell carcinoma or germ cell tumours. It has also been reported that some primary lung tumours produce AFP. However, these tumours are mainly poorly differentiated adenocarcinomas or large cell carcinomas. A lung carcinoid that produces AFP is extremely rare.