case_images: PMC11010749_01
case_images: Excisional biopsy of the right cervical lymph node (Kikuchi lymphadenitis). (A) Section revealed lymph node with distorted architecture by irregular areas of paracortical necrosis (arrow) (H&E, 4x). (B) These areas show a zone of central necrosis surrounded by pale zone of mononuclear cells (H&E, 10x). (C) The mononuclear cells are composed of lymphocytes, histiocytes, and plasmacytoid cells with no neutrophils. Frequent apoptosis and abundant karyorrhectic debris are noted (arrow) (H&E, 40x). (D) CD3 immunostaining revealed predominant reactive T lymphocytes. (E) CD68 immunostaining revealed increased histiocytes with many crescentic forms. (F) CD20 highlights scattered reactive B lymphocytes.
case_images: 10.1177_23247096241246618-fig1.jpg
case_images: PMC11010749_01_10.1177_23247096241246618-fig1.jpg
case_images: fig1-23247096241246618
case_images: An excisional biopsy of the right cervical lymph node was performed, confirming the diagnosis of KFD (Figure 1).