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Figure 1: Typical appearances of intrathoracic sarcoidosis: Sarcoidosis, thoracic. Stage II disease. (a) Chest radiograph in a 36-year-old woman shows mediastinal lymph node enlargement and bilateral pulmonary opacities. (b) Pulmonary window high resolution computed tomography image in the same patient as in (a) shows small nodules mostly along the bronchovascular bundles, giving the bronchi and vessels a beaded appearance. This distribution along the bronchovascular bundles accounts for the fact that transbronchial biopsy is usually successful for obtaining tissue for diagnosis. Courtesy Khan et al. eMedicine

Figure 1: Typical appearances of intrathoracic sarcoidosis: Sarcoidosis, thoracic. Stage II disease. (a) Chest radiograph in a 36-year-old woman shows mediastinal lymph node enlargement and bilateral pulmonary opacities. (b) Pulmonary window high resolution computed tomography image in the same patient as in (a) shows small nodules mostly along the bronchovascular bundles, giving the bronchi and vessels a beaded appearance. This distribution along the bronchovascular bundles accounts for the fact that transbronchial biopsy is usually successful for obtaining tissue for diagnosis. Courtesy Khan et al. eMedicine