Introduction: The high resolution computed tomography (HRCT) is an important\npart in the diagnostic approach of interstitial lung disease (ILD) associated\nwith connective tissue diseases (CTD) by providing detailed information\non the elementary lesion and the radiological pattern of ILD. Aim: to\npoint out the role of HRCT in the diagnosis of ILD associated with CTD\n(ILD-CTD). Methods: A Retrospective descriptive study was conducted between\n2008 and 2017. Data of 24 patients presenting ILD-CTD were collected.\nA review of HRCT was performed by a radiologist without knowledge of the\nCTD. Results: Predominant elementary lesion of ILD associated with dermatomyositis\n(9 cases) was ground glass opacity (n = 9) followed by consolidation\n(n = 6). Non Specific Interstitial Pneumonia (NSIP) was the most reported\npattern (5 cases). Ground glass opacity was also the predominant elementary\nlesion for the 2 cases of scleroderma and in Sjogrenâ??s syndrome (4\ncases/5). NSIP was the predominant radiological presentation in these two\nCTD. Lymphoid interstitial pneumonia revealed Sjogrenâ??s syndrome in one\ncase. In rheumatoid arthritis (6 cases), the elementary HRCT lesions were irregular\ninterlobular septal thickening (n = 4) and honeycombing (n = 4) consistent\nwith Usual Interstitial Pneumonia (UIP) in 2 cases. Similarly UIP has\nbeen described for the 2 patients with lupus and mixed connective tissue disease.\nConclusion: HRCT plays an important role in the management of\nILD-CTD. Description of the HRCT elementary lesions and the radiological\npattern of ILD can be helpful for CTDâ??s diagnosis.
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