Its diagnosis relies on a constellation of findings. A graphic showing a cut piece of a head cheese. Head cheese believe it or not is not a cheese and is often not made of head. Continues for weeks to months. Sarcoidosis and atypical infections associated with bronchiolitis e g.

The head cheese sign is considered to be highly specific for hypersensitivity pneumonitis although it can also be seen in other mixed infiltrative and obstructive processes e g. Patients with subacute hypersensitivity pneumonitis can also present with the head cheese sign which is characterized by the combination of foci of ground glass opacities areas of normal attenuation and air trapping indicating infiltrative disease combined with bronchiolar obstruction 1 3. Courtesy nephron hypersensitivity pneumonitis high resolution ct. Hypersensitivity pneumonitis hp or extrinsic allergic alveolitis eaa is a rare immune system disorder that affects the lungs. Ground glass infiltrates and opacities.

Subacute hypersensitivity pneumonitis develops when hypersensitivity pneumonitis continues beyond the acute phase i e. Grapes of exchange a romantic story. High resolution ct image shows bilateral poorly defined centrilobular. 1347 7935 print issn. Galaxy sign in sarcoidosis.

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Exposure to an offending antigen characteristic signs and symptoms abnormal chest findings on physical examination. Hypersensitivity pneumonitis chronic hypersensitivity pneumonitis chp. The head cheese sign is considered to be highly specific for hypersensitivity pneumonitis although it can also be seen in other mixed infiltrative and obstructive processes e g. Note the areas of ground glass opacities interspersed between normal and hypo attenuated lung fields. 8767 b the head cheese sign seen in a patient with hypersensitivity pneumonitis.

While some publications suggest the disease to needs to prevail for between 1 4 months to fall into this category 4 it is important to realize that the terms acute subacute and chronic lie. Case courtesy of a. Sufferers are commonly exposed to the dust by their occupation or hobbies. Hypersensitivity pneumonitis hp also known as extrinsic allergic alveolitis eaa represents a group of pulmonary disorders mediated by an inflammatory reaction to inhalation of an allergen that can lead to lung fibrosis. While some publications suggest the disease to needs to prevail for between 1 4 months to fall into this category 4 it is important to realize that the terms acute subacute and chronic lie.

Hypersensitivity pneumonitis hp also known as extrinsic allergic alveolitis eaa represents a group of pulmonary disorders mediated by an inflammatory reaction to inhalation of an allergen that can lead to lung fibrosis. Exposure to an offending antigen characteristic signs and symptoms abnormal chest findings on physical examination. Subacute hypersensitivity pneumonitis develops when hypersensitivity pneumonitis continues beyond the acute phase i e. The head cheese sign is considered to be highly specific for hypersensitivity pneumonitis although it can also be seen in other mixed infiltrative and obstructive processes e g. Its diagnosis relies on a constellation of findings.