We present a case of AL-type amyloidosis involving pulmonary parenchym
a and hilar and mediastinal lymph nodes in a patient with Waldenstrom'
s macroglobulinemia. Direct infiltration of pulmonary parenchyma by ly
mphocytes and plasma cells is an important factor in the etiology and
pathogenesis of pulmonary manifestations of the disease. Despite detai
led examination, eve did not find amyloid depositions in any extrapulm
onary site.