대한흉부영상의학회 Korean Society of Thoracic Radiology

Discussion

Diagnosis With Brief Discussion

Discussion

Three histologic types

1) Organizing pneumonia pattern: characterized by airways filled with plump fibroblasts and foamy histiocytes and parenchyma replaced with a mixture of histiocytes, mononuclear cells, and fibroblasts
2) Fibrous histiocytic pattern: spindle-shaped myofibroblasts arranged in whorls
3) Lymphohistocytic pattern: mixture of lymphocytes and plasma cells with only minimal fibrous connective tissue



Radiologic findings

- CT : Solitary, peripheral, sharply circumscribed, lobulated mass, variable, nonspecific heterogeneous attenuation

- MRI : enhancement Intermediate signal intensity on T1WI, high SI on T2WI

- Multiple lesions: 5%

Please also refer to Case 94, Imaging Conference 2003 Summer case9, Imaging Conference 2003 Fall case4

Keywords

Lung, Non-infectious inflammation,