Benign lymphoid hyperplasia(小结) Non-specific lymphadenitis acute non-specific lymphadenitis chronic non-specific lymphadenitis follicular hyperplasia parafollicular hyperplasia sinus histiocytosis Distinctive infectionBenign lymphoid hyperplasia （小结） • Non-specific lymphadenitis - acute non-specific lymphadenitis - chronic non-specific lymphadenitis follicular hyperplasia parafollicular hyperplasia sinus histiocytosis • Distinctive infection