Fig. 3

Histopathological section of a core needle biopsy of left cervical lymph node. A At low magnification, localized nest of necrosis area was shown in paracortex and/or cortex of lymph node (orange ring). B High magnification image of the cervical lymph node presents area of necrosis (light pink in red circle) with karyorrhectic debris (indigo blue, yellow small arrows) implying apoptosis. Many phagocytic histiocytes including a few “crescentic histiocytes” (blue arrow) are found in the area of necrosis, although there are almost no neutrophils. The specimen is a hematoxylin-eosin-stained section. White scalebar: 100 μm, yellow scalebar: 20 μm