A 20-year-old carpenter with a wound infection on his left thumb presents with an enlarged and tender lymph node in the axilla. A lymph node biopsy shows follicular enlargement and hyperemia. The sinuses are filled with neutrophils. Which of the following is the most likely diagnosis?: (A) Suppurative lymphadenitis, (B) Castleman disease, (C) Interfollicular hyperplasia, (D) Sinus histiocytosis
Answer is A. Acute suppurative lymphadenitis occurs in the lymph nodes that drain a site of acute bacterial infection. Suppurative lymph nodes enlarge rapidly because of edema and hyperemia and are tender due to distention of the capsule.Diagnosis: Suppurative lymphadenitis