Signs in Radiology Head Cheese Sign

The head cheese sign refers to a juxtaposition of regions with three (or sometimes more) different densities/regions of different attenuation within the lungs

Axial CT – Hypersensitivity Pneumonitis Bird Fancier’s Disease
55-year-old female with shortness of breath. She keeps birds for pets Axial CT through the mid lung fields shows diffuse ground glass changes with a combination of mosaic attenuation and normal lung giving the appearance of the head cheese sign.
Ashley Davidoff MD TheCommonVein.net 13551a

Axial CT – Hypersensitivity Pneumonitis Bird Fancier’s Disease
55-year-old female with shortness of breath. She keeps birds for pets Axial CT through the mid lung fields shows diffuse ground glass changes with a combination of mosaic attenuation and normal lung giving the appearance of the head cheese sign.
Ashley Davidoff MD TheCommonVein.net 13551b

Coronal CT – Hypersensitivity Pneumonitis Bird Fanciers Disease
55-year-old female with shortness of breath. She keeps birds for pets Coronal CT through the mid lung fields shows diffuse ground glass changes with a combination of mosaic attenuation and normal lung giving the appearance of the head cheese sign.
Ashley Davidoff MD TheCommonVein.net 135552a

Sagittal CT – Hypersensitivity Pneumonitis Bird Fancier’s Disease
55-year-old female with shortness of breath. She keeps birds for pets Sagittal CT through the mid lung fields shows diffuse ground glass changes with a combination of mosaic attenuation and normal lung giving the appearance of the head cheese sign.
Ashley Davidoff MD TheCommonVein.net 13552b

HEAD CHEESE SIGN, GROUND GLASS, MOSAIC PATTERN
SARCOIDOSIS, STAGE IV, PTX, ENCASEMENT
Ashley Davidoff MD

ground glass opacities (high attenuation)
mosaic attenuation pattern (low attenuation)
normal lung tissue (normal attenuation) Radiopaedia

References and Links