Remember the differential diagnosis of Interstitial Lung Disease using the mnemonics FASSTEN and BAD RASH.
UPPER lung disease
FASSTEN
- Farmer’s lung (hypersensitivity pneumonitis)
- Ankylosing spondylitis
- Sarcoidosis
- Silicosis
- TB
- Eosinophilic granuloma (Langerhans cell histiocytosis)
- Neurofibromatosis
LOWER lung disease
BAD RASH
- BOOP
- Asbestos
- Drugs (nitrofurantoin, hydralazine, isoniazid, amiodarone, many chemotherapy drugs)
- Rheumatological disease
- Aspiration
- Scleroderma
- Hamman Rich (IPF) and idiopathic pulmonary fibrosis


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