Pulmonary hamartoma

Discussion:

This was a classic incidental presentation of a benign, hamartomatous lesion, with a characteristic lobulated architecture and composed of a haphazard admixture of chondroid and adipose elements showing no features of atypia or malignancy. 

Pulmonary hamartoma should be distinguished from pulmonary chondroma, which is associated with Carney triad and is composed only of cartilage and bone with a peripheral fibrous pseudocapsule and lack adipose, smooth muscle and entrapped pulmonary elements, which may be seen in pulmonary hamartomas. 

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