Pulmonary hamartomas are the most common benign tumours of the lung. They appear as a solitary, round nodules sometimes with popcorn calcification and fatty tissue in radiologic investigation. Specific popcorn-type calcification is almost pathognomonic for pulmonary hamartoma. More than 90% of hamartomas are peripheral. Only 10% or less are located centrally. Surgical treatment is the gold standard in intraparenchymal hamartomas including enucleation or wedge resection with parencym saving as possible. Endobronchial hamartomas can be removed successfully through bronchoscopy. There have been many reports suggesting an association between hamartoma with pulmonary and extrapulmonary malignancy. Classification of hamartomas as benign tumors causes Neglect of patients in detail and long follow-up in postoperative follow-up. It is clear that there is a high incidence of malignancies in cases with pulmonary hamartomas. Because of the close association with malignancy, patients who have a hamartoma diagnosis should be followed up frequently and for a long time.