Computed Tomography and Pet/Ct Features of Pulmonary Hamartomas

Abstract

Introduction: In this study, we aimed to examine the computed tomography (CT) and 18F-fluorodeoxyglucose positron emission tomography/computerized tomography (FDG PET/ CT) findings of the pulmonary hamartomas. Methods: Following surgical excisional, transbronchial, or transthoracic biopsy, histopathologically proven pulmonary hamartomas were retrospectively reviewed between 2007 and 2013. The CT and PET/CT images were interpreted regarding the lesion diameter, number, location, components, and standardized uptake values (SUVmax). Results: A total of 22 hamartomas including 2 endobronchial and 20 parenchymal hamartomas were detected in 21 patients (11 males and 10 females). Among them, one patient had both endobronchial and parenchymal lesions. Right lung involvement (63.7%) was more common than left lung (36.4%) and upper lobes involvement (50%) than lower lobes (25%). Of all lesions, 54.5% had smooth margins while 40.9% had lobulated contour and 4.5% had irregular margins. Fat density was observed in 54.5% and calcification in 40.9%. In 18.2% of the lesions neither fat density nor calcification was seen. There was no FDG uptake in 5 lesions. Mean SUVmax value was 1.6±1.0 (range between 0 and 3,2). A SUVmax value > 2.5 was observed in 5 lesions. Conclusion: Our results were generally consistent with previous reports, but we found a higher female/male ratio and a more common upper lobes involvement of pulmonary hamartomas. © 2021 The Author(s).