Histologic Changes

Scattered through the biopsy are non-necrotizing granulomas that appear to be the same age as the surrounding organizing pneumonia and appear to blend with it.

Special stains for fungi and acid-fast organisms were negative. The granuloma is composed of histiocytes with spindled nuclei and a few lymphoid cells. Giant cells are absent.

More consolidated areas are also present. Here, the air spaces are filled with pink, proteinaceous exudate. The organizing, interstitial pneumonia appears as the bluish tissue.

Clinical summaryDiagnosis

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