Lipid Granulomatosis is a rare condition that affects the lungs and causes nodular lesions. This disease is also known as pulmonary alveolar proteinosis, chronic interstitial pneumonitis, and alveolar lipoproteinosis. Lipid Granulomatosis is diagnosed when there is an accumulation of lipids, or fats, within the alveoli, which are the small air sacs in the lungs. The condition is characterized by the formation of granulomas, which are small lumps of tissue that appear due to an immune response. Other synonyms for Lipid Granulomatosis include pulmonary lipidosis, alveolar proteinosis, and pulmonary interstitial lipidosis. These terms are commonly used by medical professionals to describe the same condition.