While DIST may be present to variable extents in a number of lung conditions, it is uncommon as a predominant finding except in a few entities. 1, 3). Unable to process the form. Intralobular vessels appear abnormally prominent because of centrilobular interstitial thickening (arrowhead). Subpleural intralobular interstitial thickening, reticulation, and traction bronchiectasis and initial honeycombing in a patient with systemic sclerosis. Bronchovascular bundle thickening was noted in 13 patients (30%). Irregular interlobular septal thickening. Criado E, Sánchez M, Ramírez J, Arguis P, de Caralt TM, Perea RJ, Xaubet A. Intralobular septal thickening is a form of interstitial thickening and should be distinguished from interlobular septal thickening. Insights Imaging. The lesions were predominantly peripheral in 38 patients (88%). Idiopathic pleuroparenchymal fibroelastosis: an unrecognized or misdiagnosed entity?. 2005;237 (3): 1091-6. Stepwise regression analysis showed a relationship between the extent of septal thickening and the extent of bronchiectasis (P < .001). * 2. 5. 5. Oikonomou A, Prassopoulos P. Mimics in chest disease: interstitial opacities. 72 (7): 673. The common CT findings of lung parenchymal lesions were as follows: centrilobular opacities (94%), subpleural dot-like or branching opacities (80%), interlobular septal thickening (57%), intralobular interstitial thickening (46%), parenchymal bands (43%) and subpleural curvilinear line (29%). The bronchioles and bronchi in the areas of fibrosis are often dilated ]. FIGURE 23-24 Intralobular interstitial thickening and intralobular lines. 7-9 2. Inter and intralobular septal thickening with typical honeycombing. Results: CT abnormalities were found only in groups 1 and 2. Of these peribronchovascular interstitial thickening and interlobu-lar septal thickening are discussed below. There is also smooth thickening of the interlobular septa. intralobular interstitial thickening, interlobular septal thickening, infiltration 浸潤影 肺胞出血、肺炎、COP Reference: Jun Hyun Baik, et al. interlobular septal thickening, intralobular interstitial thickening, wall cysts of honeycombing, peribronchovas-cular interstitial thickening and traction bronchiectasis/ bronchiolectasis . Intralobular interstitial thickening results in an irregular reticular pattern smaller in scale than the reticular pattern of interlobular septal thickening. It has been described with several conditions of variable etiology which include sarcoidosis 2 Interstitial thickening is pathological thickening of the pulmonary interstitium and can be divided into: interlobular septal thickening intralobular septal thickening See also interlobular septa secondary pulmonary lobules In the process of resorption of intraalveolar blood, parenchymal abnormality is accompanied by interlobular and intralobular interstitial thickening superimposed on areas of ground-glass opacity (Figs. 1 x. HR-CT image showing extensive fibrosis at the base of the right lung. Interlobular septal thickening and intralobular interstitial thickening was noted in 28 patients (65%), respectively. Intralobular linear opacities reflect thickening of the interstitium within the secondary pulmonary lobule and are most commonly caused by fibrosis. On HRCT, numerous clearly visible septal lines usually indicates the presence of some interstitial abnormality. Thick- ened interlobular septae are demonstrated as short lines extending perpendicularly to the peripheral pleura or the fissures, or as polygonal arcades surrounding secondary pulmonary lobules more centrally. Thickening of the interlobular septa is a common and easily recognized high-resolution computed tomography feature of many diffuse lung diseases.In some cases, it is the predominant radiological finding. Unable to process the form. Naidich DP, Srichai MB, Krinsky GA. Computed tomography and magnetic resonance of the thorax. Also could be secondary to airspace disease with linear deposition of material in the periphery of the acini (1). 2008;21 (6): 784-7. ADVERTISEMENT: Radiopaedia is free thanks to our supporters and advertisers. High-resolution CT of the lungs. 3. Pathol. 4. 4. Septal thickening can be Baik JH, Ahn MI, Park YH, Park SH. 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