Head Cheese Sign Hypersensitivity Pneumonitis

1347 7935 print issn. Increase in density in areas of ground glass and air trapping in lower lobes in a patient with hypersensitivity pneumonitis courtesy mluisamtz11 41 year old man with subacute hypersensitivity pneumonitis. Exposure to an offending antigen characteristic signs and symptoms abnormal chest findings on physical examination.

Camila Farah

Its diagnosis relies on a constellation of findings. Head cheese believe it or not is not a cheese and is often not made of head. Sufferers are commonly exposed to the dust by their occupation or hobbies. Continues for weeks to months. A graphic showing a cut piece of a head cheese.

8767 b the head cheese sign seen in a patient with hypersensitivity pneumonitis. Courtesy nephron hypersensitivity pneumonitis high resolution ct. Note the areas of ground glass opacities interspersed between normal and hypo attenuated lung fields. Grapes of exchange a romantic story. 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.

Hypersensitivity pneumonitis hp or extrinsic allergic alveolitis eaa is a rare immune system disorder that affects the lungs. 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. 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. Galaxy sign in sarcoidosis. It is an inflammation of the alveoli airspaces within the lung caused by hypersensitivity to inhaled organic dusts.

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Case courtesy of a. 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. High resolution ct image shows bilateral poorly defined centrilobular. Ground glass infiltrates and opacities. Subacute hypersensitivity pneumonitis develops when hypersensitivity pneumonitis continues beyond the acute phase i e.

Sarcoidosis and atypical infections associated with bronchiolitis e g. Hypersensitivity pneumonitis chronic hypersensitivity pneumonitis chp. 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. Sarcoidosis and atypical infections associated with bronchiolitis. Sarcoidosis and atypical infections associated with bronchiolitis e g.

Sarcoidosis and atypical infections associated with bronchiolitis. Case courtesy of a. Hypersensitivity pneumonitis hp or extrinsic allergic alveolitis eaa is a rare immune system disorder that affects the lungs. 8767 b the head cheese sign seen in a patient with hypersensitivity pneumonitis. Its diagnosis relies on a constellation of findings.