1. A Diagnostic Conundrum
Eugene Shostak, MD, Rasheed Ameer, MD, James Gruden, MD, Jose Jessurun, MD 
CHEST 
Volume 155, Issue 5, Pages e131-e135 (May 2019)
DOI: /j.chest
Copyright © 2019 American College of Chest Physicians Terms and Conditions

2. Figure 1
A-B, Posterior-anterior (A) and lateral (B) views of chest radiograph showing lobulated opacity in the right middle lobe (arrow).
CHEST  , e131-e135DOI: ( /j.chest )
Copyright © 2019 American College of Chest Physicians Terms and Conditions

3. Figure 2
A-C, Contrast-enhanced chest CT scan showing dilated branch of pulmonary vein (red arrow) entering a lobulated tubular density in the right middle lobe (blue arrow). Small transfissural collaterals are seen entering right lower lobe (yellow arrow).
CHEST  , e131-e135DOI: ( /j.chest )
Copyright © 2019 American College of Chest Physicians Terms and Conditions

4. Figure 3
A, Hematoxylin and eosin stain under low magnification showing abnormally dilated varicose veins and areas of hemorrhage intermixed with alveolated lung parenchyma. B, Higher magnification lung parenchyma replaced by engorged vascular spaces. H = hemorrhage; P = alveolated lung parenchyma; S = vascular spaces; V = varicose veins.
CHEST  , e131-e135DOI: ( /j.chest )
Copyright © 2019 American College of Chest Physicians Terms and Conditions