“…Histiocytes, occasionally undergoing mitosis, appeared large and foamy, containing abundant cytoplasm, either granular or vacuolated, with vesicular nuclei round-to-oval in shape. Significantly, large histiocytes with emperipolesis and positive staining for S-100 and CD68, but negative staining for CD1a, were observed (5,6). Clinically, the typical symptoms of RDD are painless enlargement of bilateral cervical lymph nodes with fever, elevated neutrophils, increased ESR, and hyperglobulinaemia (7).…”