Diffuse pulmonary ossification is a relatively rare, well recognized condition, of which a number of reports exist in the literature. While the histologic picture of diffuse pulmonary ossification, with its nodular and dendritic forms, is well know, the pathogenesis is not yet fully clarified; a number of diseases have been claimed to be responsible for, or associated to diffuse pulmonary ossification, but the association with diabetes mellitus is so far undescribed. That's why we report this case, along with the discussion of some pathogenetic hypotheses and differential diagnosis.
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