Localized amyloid 'tumours ' of the lung simulating malignant neoplasms

into (1) generalized secondary amyloidosis; (2) generalized primary amyloidosis; and (3) local-ized amyloidosis. Involvement of the respiratory tract by amyloid material in the generalized systemic form of the disorder is not as rare as is commonly supposed. In amyloidosis associated with a recognized pre-disposing disease the incidence is at least 10% (Dahlin, 1949), and in generalized primary amyloidosis in the absence of any recognized pre-disposing disease Symmers (1956) found involve-ment of the lungs in 30 % of 145 cases. In both these groups of cases, which form the majority of all patients with amyloidosis, pulmonary symp-toms are usually overshadowed by the severity o