Published on: Mar 4, 2016
Transcripts - “Popcorn” calcifications
images in clinical medicine
The new engl and jour nal of medicine
n engl j med 360;12 nejm.org march 19, 2009 e17
tomatic mass in the left upper lung that had been detected on chest radiog-
raphy (Panel A, arrow) performed during a physical screening before the
start of military service. He was a nonsmoker, had no pulmonary symptoms, and
was otherwise well. Nonenhanced computed tomography (CT) of the chest revealed
a well-defined mass, 3 cm in diameter, in the left upper lobe, containing multiple
calcifications (Panel B, arrow). A magnified (wide-window) image of the mass
showed calcifications of a linear, nodular, irregular shape, known as “popcorn” cal-
cifications. The CT findings were highly suggestive of pulmonary chondroid hamar-
toma. Pathological examination of tissue obtained by means of percutaneous biopsy
revealed cartilage and spindle-cell mesenchymal stroma, confirming the diagnosis.
Two years later, the patient remains well, and the tumor is unchanged. Pulmonary
hamartoma is a benign lung tumor that should be considered when an incidental
solitary pulmonary nodule is identified. Popcorn calcifications within a well-circum-
scribed pulmonary nodule are highly suggestive of pulmonary chondroid hamartoma.
Copyright © 2009 Massachusetts Medical Society.
“Popcorn” Calcifications in a Pulmonary
Chang Min Park, M.D.
Jin Mo Goo, M.D.
Seoul National University Hospital
Seoul 110-744, South Korea
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The New England Journal of Medicine
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