Fig. 3From: Resolution of an insidious and migratory Mycobacterium tuberculosis-associated secondary organizing pneumonia: a case report and literature reviewMasson body and CD68 staining. Biopsy pathological section revealed Masson body indicated by a red circle (left). CD68 staining showed that CD68 positive cells were only observed in the alveolar lumen, as indicated by the red arrow (right)Back to article page