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Radiology. 1998 Feb;206(2):511-8.

Pulmonary inflammatory pseudotumor: radiologic features.

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1
Department of Radiologic Pathology, Armed Forces Institute of Pathology, Washington, DC, USA.

Abstract

PURPOSE:

To define the radiologic features of pulmonary inflammatory pseudotumor.

MATERIALS AND METHODS:

Between 1966 and 1994, 61 cases of pulmonary inflammatory pseudotumor involved 36 male and 25 female patients (age range, 17 months to 61 years; mean, 28 years). Clinical presentation, pathologic features, and radiologic findings were noted.

RESULTS:

At radiography, 52 patients had solitary peripheral nodules or masses, and extraparenchymal involvement--including hilar, mediastinal, and airway invasion--was found in 11. At computed tomography, 12 lesions were of heterogeneous attenuation and five, homogeneous. At T1-weighted magnetic resonance imaging, five lesions had intermediate signal intensity; of two lesions studied with T2-weighted imaging, two had high signal intensity; and the one lesion studied with gadolinium-enhanced imaging had diffuse enhancement.

CONCLUSION:

Pulmonary inflammatory pseudotumor was typically a solitary, peripheral, sharply circumscribed mass with an anatomic bias for the lower lobes. Local invasion and primary involvement of the mediastinum and hilar structures were unusual manifestations.

[Indexed for MEDLINE]

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