Table 2 A detailed histopathological features of HP cases

Interstitial pneumonia

36 (83.7%)

Centrilobular

8 (18.6%)

Diffuse

11 (25.5%)

Centrilobular and diffuse

17 (39.5%)

Cellular bronchiolitis  (Fig. 4)

36 (83.7%)

Lymphoplasmacytic

32 (74.4%)

Histiocytes and multinucleated giant cells

4 (9.3%)

Interstitial granulomas (Fig. 5)

Isolated Multinucleated Giant Cells (IMNGCs) (Fig. 3)

38 (88.3%)

Interstitial

14 (32.5%)

Air spaces

24 (55.8%)

Organizing Pneumonia (OP)

Fibrosis

10 (23.2%)

Interstitial (NSIP^a- like)

4 (9.3%)

Peribronchiolar

3 (6.9%)

UIP^a-like

2 (4.6%)