[Lung diseases associated with silicosis. Study of 618 cases].

Retrospective research has been carried out on the clinical reports of 618 cases of patients suffering from silicosis admitted to the S. Luigi Gonzaga Hospital in 1973-1987 (1.4% of all pneumopathy admittances). A comparative evaluation of the five-year periods 1973-77, 1978-82, 1983-87 showed a steady reduction in the percentage of silicosis to total cases (from 1.62% to 1.55% and 1.16%). Among the 618 cases assessed, the following pneumopathies were associated with silicosis either alone or in combination: chronic obstructive bronchopneumopathy (89.4%), pulmonary tuberculosis (22.2%), bronchogenic carcinoma (8.4%), acute aspecific infections (26.1%), mycosis (0.6%), sarcoidosis (0.3%), other pneumopathies (1.1%). Comparison between the three five-year periods shows an increase in the frequency of the silicosis-carcinoma association and a fall in the silicosis-tuberculosis and silicosis-COLD associations.