The upper and lower lobe distribution of certain bilateral pulmonary pathologies can be recalled using the following mnemonics:
- upper lobe or apical predominance: CASSET HPP or SET CAP
- lower lobe or bibasilar predominance: BAD RASH
Mnemonics
CASSET HPP
- C: cystic fibrosis
- A: ankylosing spondylitis
- S: silicosis
- S: sarcoidosis
- E: eosinophilic granuloma (Langerhans cell histiocytosis)
- T: tuberculosis
- H: hypersensitivity pneumonitis
- P: pleuroparenchymal fibroelastosis
- P: pneumocystis pneumonia
SET CAP
- S: silicosis/sarcoidosis
- E: EG/extrinsic allergic alveolitis
- T: TB/fungal
- C: cystic fibrosis
- A: ankylosing spondylitis
- P: PCP
BAD RASH
- B: bronchiectasis
- A: aspiration
- D: DIP
- R: rheumatoid arthritis associated-interstitial lung disease 1
- A: asbestosis
- S: scleroderma (progressive systemic sclerosis)
- H: Hamman-Rich syndrome (Acute interstitial pneumonitis)
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