Solitary pulmonary nodules due to sarcoidosis.

: Two patients, a 67-year-old woman and a 33-year-old man, had asymptomatic solitary nodular masses in the lung detected by roentgenographic examination. The preoperative investigations failed to make a firm diagnosis or to rule out the presence of a malignant lesion. In both patients the lesions were resected and found to contain noncaseating granulomas. Electron microscopy and immunochemical studies for lysozyme supported the diagnosis of solitary nodular sarcoidosis. Such roentgenographic presentations of sarcoid are rare.