Abstract
Background. Nodular lymphoid hyperplasia (NLH) is a rare benign disease that is classified as a reactive pulmonary lymphoproliferative disorder. Due to a lack of specific imaging features, NLH is difficult to differentiate from lung cancer. We herein report a case in which lung cancer was suspected in a patient with NLH based on the imaging findings. Case. A 61-year-old man was referred to our department due to the detection of a solitary pulmonary nodule of approximately 7 mm in diameter on chest computed tomography (CT). Ten months later, chest CT revealed that the nodule had nearly doubled in volume and showed a pleural tag. Lung cancer was suspected, and a surgical biopsy was performed. It was histopathologically diagnosed as NLH. Conclusion. NLH is a rare benign disease that is difficult to distinguish NLH from lung cancer before surgical biopsy because NLH shows various imaging findings. We presented a case of NLH which grew during short term and showed a pleural tag. It shows a significant CT finding in a case of NLH. The accumulation of further cases is needed in order to improve the diagnosis of NLH.
