The authors report a typical case of pediatric sarcoidosis presenting a granulomatous pulmonary disease with systemic impairment, reviewing clinical, diagnostic, and particular aspects of the disease in this age group, with emphasis on the difficulty to differentiate its diagnosis from that of tuberculosis.

Keywords: Sarcoidosis. Pulmonary sarcoidosis. Lung diseases.

Mounier-Kuhn syndrome, or tracheobronchomegaly, is a rare clinical entity characterized by abnormal dilation of the trachea and main bronchi. The diagnosis can usually be made by measuring the tracheal diameter. We report the case of a 40-year-old black man with refractory lower respiratory tract infection. Tracheobronchomegaly was confirmed through computed tomography.

Keywords: Tracheobronchomegaly/diagnosis; Tomography, X-ray computed; Tracheobronchomegaly/rehabilitation;

Organizing pneumonia, whether or not accompanied by bronchiolitis obliterans, is a specific anatomicopathological condition of the lungs that can present in a variety of clinical and radiographic ways. It can be either idiopathic or secondary to a number of diseases, including infection and drugs. Objectives: To describe the clinical manifestations, radiographic and spirometric data seen in patients with organizing pneumonia. Methods: Retrospective analysis of patients with a diagnosis of organizing pneumonia. Results: 38 patients were included in the analysis. Fourteen also had clinical conditions related to organizing pneumonia, and they presented more frequently with diffuse pulmonary infiltrates (three of four cases) and associated bronchiolitis obliterans (57% vs. 20%, p = 0,05). Of the 13 patients with bronchiolitis obliterans, only one was asymptomatic and two had localized lesions (15%). Of the eight asymptomatic patients with localized lesions, no one had associated bronchiolitis obliterans, and the radiographic appearance often resembled bronchial carcinoma. Spirometry was generally of little value to diagnosis, probably because of the high prevalence of smoking in the sample. Conclusion: The clinical and radiographic presentation of organizing pneumonia is variable. Factors that suggest the absence of coexisting bronchiolitis obliterans are the absence of symptoms and localized radiographic lesions, and this form of the disease has to be more often differentiated from bronchial carcinoma in clinical practice.