PMC9673915_01
CXR: In both lungs are visible branching and nodular calcific small opacities.
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A chest X-ray (CXR) showed multiple pulmonary small nodules localized in both lungs from the upper fields to the lower fields, with a greater anatomical profusion in the middle fields (Fig. 1).
CT scan lung windows (1.25 mm collimation) of lower lung lobes: nodular thickening of contiguous interlobular septa and subpleural tiny nodules in posterior and lateral basilar segments of both lower lobes. Absence of distortion and/or traction bronchiolectasis.
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The nodules owned the same distribution between the upper and lower lobes in both lungs (Fig. 2a). There was no evidence of mediastinal lymph nodes increased in size and/orsigns of air trapping (Fig. 2b). MPR coronal reconstructions showed small nodules in both lungs with a CT appearance of DPO (Fig. 2b).
CT scan lung window MPR coronal view: nodular thickening of contiguous interlobular septa and subpleural tiny nodules in both lower lobes. Absence of distortion and/or traction bronchiolectasis.
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The patient subsequently underwent a PET/CT examination to try to obtain further information capable of increasing diagnostic accuracy and possibly formulating a confident diagnosis that however did not show any significant increase in the metabolic activity in both lungs (Fig. 3).
PET/CT examination: not significant increase in metabolic activity in both lungs.
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Mature bone tissue of variable shape and size was observed inside the alveoli, sometimes conforming to their contours (Fig. 4).