Alveolar wall thickening 4. Subpleural thickening 5. Linear form - LIFE lines Lymphangitic spread of malignancy Inflammation Fibrosis Edema 2. Nodular form Granulomas Hematogenous spread of malignancy Pneumonoconiosis 3. Specific causes of fibrosis E. Destructive form Characterized by permanent lung destruction with architectural distortion of the parenchyma.
Early appearance is nonspecific, usually identical with linear form.
B. Radiological Signs Changes in diameter of specific vessels. Congestion - engorged veins, especially upper lungs 2. Emphysema - diminished vessels 3. Arterial hypertension - large central arteries with peripheral tapering 4. Thromboembolism - locally diminished vessels with possible vessel mass centrally located 5.