Algorithm for Diagnosis of Diffuse Cystic Lung Disease (DCLD)

Round, smooth cysts with normal lung parenchyma in a diffuse distribution

 - LAM

Lentiform/elliptical cysts abutting pleura & vessels in a basilar predominant distribution

 - BHD

Bizarre/irregular cysts along with nodules & cavities in an upper zone predominant distribution

 - PLCH

Round cysts of varying size. May have associated ground glass attenuation, septal thickening & nodules. Diffuse distribution

- LIP/FB, LCDD, SS

Cyst pattern not consistent with previous presentations

- ILD, trauma, metastatic neoplasm, smoking related



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