Pulmonary hyalinizing granuloma: a rare cause of a solitary pulmonary nodule.

Pulmonary hyalinizing granulomata are unusual, noninfectious lesions of the lung of uncertain etiology that probably represent an exaggerated immune response. They present radiographically as noncalcified solitary or multiple pulmonary nodules, thereby mimicking primary or metastatic malignancy. The article discusses a case of this rare entity that presented as a solitary pulmonary nodule.