<prompt> 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?Suppurative lymphadenitisCastleman diseaseInterfollicular hyperplasiaSinus histiocytosis  <response>: 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 