PMC7184270_01
(legend) Chest CT showing moderate sized right pneumothorax and bilateral partially calcified branching reticulonodular opacities with a mild basal predominance. Mild architectural distortion was noted without traction bronchiectasis or fibrosis.
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Computed tomography (CT) of the chest revealed bilateral partially calcified branching reticulonodular opacities with a basal predominance (Fig. 1).
PMC7184270_02
(legend) Chest CT showing multiple foci of high attenuation peripheral branching opacities throughout the left lung, particularly in the left base. No evidence of fibrosis or bronchiectasis.
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Chest CT revealed postoperative changes with multiple foci of high attenuation peripheral branching opacities greatest in the left lower lobe and several small non-calcified pulmonary nodules unchanged in comparison to previous imaging (Fig. 2).
(legend) Section showing fibrotic organizing pneumonia undergoing collagen deposition as well as prominent intraalveolar ossification with branching, dendritic, mature bone formation.
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Review of prior biopsies suggested DPO with findings of cicatrical organizing pneumonia and associated extensive intra-alveolar ossification (Fig. 3).