Pulmonary sarcoidosis mimicking tuberculosis: Importance of the galaxy sign on thoracic computed tomography. / Sarcoidosis pulmonar simulando una tuberculosis: importancia del signo de la galaxia en TC de tórax.

Sarcoidosis and tuberculosis are two common granulomatous conditions that may share clinical and radiological presentations. The galaxy sign (sarcoid galaxy sign) is a characteristic radiological sign of pulmonary sarcoidosis on thoracic computed tomography (CT). We present the case of a patient with sarcoidosis that was initially misdiagnosed as tuberculosis, in whom the galaxy sign on CT was useful as it suggested the correct diagnosis.

Cystic adenomatoid malformation of the lung in adult patients: clinicoradiological features and management.

PURPOSE: Congenital cystic adenomatoid malformation (CCAM) of the lung in adults is very rare. We aimed to evaluate the clinicoradiological features of adult patients with CCAM. METHODS: Adult patients diagnosed with CCAM were evaluated for clinicoradiological presentation and management. METHODS: Nine patients were diagnosed with CCAM (four were incidentally diagnosed on chest imaging). Most cases appeared on computed tomography as thin-walled multiseptated cystic lesions. Two patients had another concurrent pulmonary developmental anomaly. Five patients were surgically treated and three conservatively. CONCLUSIONS: CCAMs might be incidentally diagnosed on routine chest imaging in adults and can be safely treated with minimally invasive techniques.

Idiopathic fibrosing mediastinitis: spectrum of imaging findings with emphasis on its association with IgG4-related disease.

PURPOSE: The purpose of this study was to review the clinicoradiological features of idiopathic fibrosing mediastinitis (FM). METHODS: The records of six patients with idiopathic FM were retrospectively reviewed. RESULTS: The most common presenting symptom was cough. There were three localized forms and three diffuse forms. Definitive histological diagnosis was most commonly made with mediastinoscopy. Interestingly, three of our patients had disease manifestations of IgG4-related disease (IgG4-RD) outside the mediastinum. CONCLUSION: The imaging findings of idiopathic FM vary depending on the involved mediastinal structures. Therapeutic options include medical treatment, stenting, or surgery. Radiologists should pay attention to the possible association of idiopathic FM with extrathoracic manifestations of the IgG4-RD spectrum.