Interlobar Pulmonary Hamartoma With an Unusual Neighboring Lesion: A Case Report.

Pulmonary hamartomas are benign lung tumors. They are uncommon and represent a small percentage of all solitary lung lesions. Hamartomas are composed of an abnormal mixture of epithelial and mesenchymal elements. They are usually discovered incidentally as patients are asymptomatic in most cases. On the other hand, sclerosing pneumocytomas are rarely discovered and are one of the most uncommon benign lung tumors. Herein, we present the case of a 37-year-old female who presented with hemoptysis. A computed tomography scan of her thorax revealed a right-sided round lesion in the interlobar fissure with no additional findings. Surgical excision was performed, which demonstrated an uncommon and unique finding of a pulmonary hamartoma coexisting with a sclerosing pneumocytoma found on exploration. This highlights the importance of exploration during surgical procedures in order identify missed lesions on imaging.