Faces of Calcifications Interlobular Septa Septal Calcifications TB CALCIFICATION ALONG LYMPHOVASCULAR BUNDLES (red arrows)INACTIVE SECONDARY TB WITH EXTENSIVE PARENCHYMAL AND LYMPHOVASCULAR INVOLVEMENT48-year-old male with history of TB presents with back painAP view of the spine shows complex lesion in the right apex characterized by fibronodular opacities. There are scattered calcifications throughout the lungs but some are centered around the lymphatics, including the interlobular septa and centrilobular regionAshley Davidoff MD TheCommonVein.net ZOOMED IN VIEWCALCIFICATION ALONG LYMPHOVASCULAR BUNDLES (red arrows)INACTIVE SECONDARY TB WITH EXTENSIVE PARENCHYMAL AND LYMPHOVASCULAR INVOLVEMENT48-year-old male with history of TB presents with back painAP view of the spine shows complex lesion in the right apex characterized by fibronodular opacities. There are scattered calcifications throughout the lungs but some are centered around the lymphatics, including the interlobular septa and centrilobular regionAshley Davidoff MD TheCommonVein.net Latent TB with Calcified Septal Granulomas and Calcified Centrilobular Nodule48-year-old male with history of TBAxial CT through the mid chest shows calcified granulomas along an interlobular septum of a secondary lobule. There is also a centrilobular calcified granuloma These calcifications are likely centered around the lymphatics of the bronchovascular bundle and in the interlobular septumAshley Davidoff MD TheCommonvein.net 132604c CT Alveolar Septal Amyloidosis with Calcifications CT Alveolar Septal Amyloidosis with Calcifications56 -year-old female with a history of amyloidosis (AL) presents for follow up. Axial CT of the chest shows diffuse reticular process best appreciated anteriorly with thickening of the interlobular septa. Punctate, dystrophic calcifications are seen in the interlobular septa (white arrowheads a, c and d), as well as in the pleura abutting the mediastinum (white arrowhead a). Image b shows similar calcifications, likely deposits of amyloid in the axilla with surrounding soft tissue changesAshley Davidoff MD TheCommonVein.net 244 Lu 135741d02cL