Figure 2

Histopathological findings. A: Lymph node histology of the patient showed aggregation of histiocytes and plasmacytoid monocytes with focal necrosis, scattered pyknotic nuclei and karyorrhexis (HE, ×20). Insert shows more details (HE, ×40). B: Lung biopsy illustrating intraluminal fibrous tissue plugs with adjacent thickened interstitium, intraalveolar macrophages, and lymphoplasmacytic inflammation (HE, ×20). Insert shows more details (HE, ×40).