NODULAR FIBROSIS OF THE LUNG IN DIABETES-MELLITUS

The target organs in diabetes mellitus include the kidneys, the eyes a nd the small vessels. In these organs some specific histopathological changes have been described but there are few reports of histopathoogi cal changes in the lung in diabetic patients. Several reports describe abnormal pulmonary function in diabetic patients and consider these a bnormalities to be due to histopahtological changes found in the pulmo nary vessels, We have studied the histopathological changes in the dia betic lung comparing the findings in the autopsies of 61 diabetic and 50 non-diabetic patients. Statistically significant differences in the incidence of chronic obstructive lung disease and pulmonary haemorrha ge exist. There are no differences in the incidence of fibrosis of the alveolar walls or intimal and medial thickening of small vessels, cha nges associated with diabetes according to the literature. We have fou nd a specific type of nodular fibrosis not previously reported which w e believe to be typical of diabetes.