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Radiology Packet 8. Pulmonary Pattern - Interstitial. 8-year old Labrador Retriever “Jake”. Hx: Presented for progressive stranguria. Abdominal radiographs were obtained and a small portion of the caudal lung fields were visible so thoracic films were taken.

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Radiology Packet 8

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Radiology packet 8 l.jpg

Radiology Packet 8

Pulmonary Pattern - Interstitial


8 year old labrador retriever jake l.jpg

8-year old Labrador Retriever“Jake”

  • Hx: Presented for progressive stranguria. Abdominal radiographs were obtained and a small portion of the caudal lung fields were visible so thoracic films were taken.


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8-year old Labrador Retriever“Jake”

  • RF

    • The cardiac silhouette and pulmonary vessels are slightly small.

    • The bronchial walls are visible as thin, opaque lines extending into the periphery of the lungs.

    • There is an overall increase in lung opacity that causes the pulmonary vessels to be poorly seen.

    • There are multiple small, poorly defined interstitial nodules.

  • RD

    • The predominant lung pattern is reticulonodular interstitial

    • Changes are in the interstitium and are both reticular and nodular

    • Mixed bronchial pattern is also present

  • R/O

    • Metastatic neoplasia

      • Prostatic adenocarcinoma

      • Mammary adenocarcinoma

      • Hemangiosarcoma

    • Pulmonary lymphoma

    • Fungal pneumonia

  • Next

    • Abdominal ultrasound with special emphasis on the urinary bladder and prostate.


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6-year old Labrador cross “Sam”

  • Hx: Recurrent fevers. The fevers have occurred intermittently for the last 12 months and are responsive to treatment with antibiotics.


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6-year old Labrador cross “Sam”

  • RF

    • Multiple variably sized nodules present.

    • In the lateral view the largest nodule is seen overlying the diaphragm.

    • The liver is slightly small.

  • RD

    • Multiple interstitial lung nodules

  • R/O

    • Metastatic neoplasia

    • Primary pulmonary neoplasia (unlikely)

    • Abscess/granuloma formation

  • Next

    • Abdominal radiographs and/or ultrasound


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6-year old Standard Poodle

  • Hx: Sudden onset of coughing


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6-year old Standard Poodle

  • RF

    • There is a diffuse nodular interstitial lung pattern.

    • Interstitial nodules are extremely tiny and there are many of them. In some areas they coalesce and form a heavy interstitial pattern.

    • In the VD view the central area of the thorax is more opaque due to overlying soft tissues and the line in the left hemi-thorax is the result of superimposition of a skin fold.

  • RD

    • Diffuse nodular interstitial lung pattern with evidence of mineralization of interstitial nodules

  • R/O

    • Pneumoconiosis

    • Fungal pneumonia

    • Metastatic neoplasia

  • Next

    • Fine needle aspirate of lung tissue


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9-month old Labrador Retriever “Amos”

  • Hx: Castrated at the age of 7 months and has had a cough since that time. The cough is noted to be non-productive and has progressed in the last 2 weeks. Thoracic radiographs were obtained.


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9-month old Labrador Retriever “Amos”

  • RF

    • In the lateral view there is an unusual appearance to the cranial heart border. This is the result of an exposure made during systole.

    • In the VD view the right heart appears prominent. This is the result of slight rotation in positioning.

    • There is a moderate diffuse broncho-interstitial lung pattern. The overall increase in pulmonary opacity is the result of interstitial infiltrates.

    • Bronchial markings extend well beyond the hilar area.

  • RD

    • Moderate diffuse broncho-interstitial lung pattern

  • R/O

    • Parasitic lung disease

    • Allergic lung disease

  • Next

    • Fecal evaluation for lungworm larvae (Baermann)


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4-year old German Shorthair Pointer “Autumn”

  • Hx: 2 episodes of mild weakness/collapse associated with intense exercise. A persistent cough is also reported. A systolic cardiac murmur with the point of maximal intensity at the aortic valve was noted a year ago.


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4-year old German Shorthair Pointer “Autumn”

  • RF

    • In the lateral view the heart appears widened and the cranial border is slightly square indicating right ventricular enlargement.

    • Buchanan measurement is 11.4 so the increase in size is mild.

    • In the VD view there is rounding of the right ventricular area.

    • There is a moderate diffuse interstitial pulmonary pattern.

  • RD

    • Mild right-sided cardiac enlargement

    • Moderate diffuse interstitial lung pattern with occasional bronchial markings

  • R/O

    • Tricuspid valve insufficiency

    • Cor pulmonale

    • Lungworm infestation

    • Interstitial pneumonia

    • Interstitial changes due to prior pulmonary disease that is now inactive

  • Next

    • Echocardiography

    • Baermann fecal exam


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9-year old castrated male Shih Tzu

  • Hx: Chronic cough of 3 weeks duration. Recently the dog has also been mildly anorexic and the owners thing the dog has lost weight. The rDVM had radiographied the thorax and diagnosed an esophageal diverticulum.


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9-year old castrated male Shih Tzu

  • RF

    • A large, ~ 6cm circular mass is present in the dorsal part of the left caudal lung lobe.The mass has a radiolucent center surrounded by a soft-tissue opacity outer portion.

    • A second small mass, about 4cm x 3cm is present in the dorsal portion of the right cranial lung lobe. The mass also has a radiolucent area.

    • Several other smaller, irregular soft tissue opacity nodules are present in the ventral parts of the right middle and left caudal lung lobes

  • RD

    • 2 cavitated masses within the pulmonary parenchyma along with a nodular interstitial pattern

  • R/O

    • Primary lung tumor with pulmonary metastasis

    • Metastatic neoplasia

    • Pulmonary abscesses or granulomas

  • Next

    • Transtracheal aspirate or bronchoalveolar lavage

    • CBC

    • Fine needle aspirate of mass using US guidance


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7-year old Beagle“Dawg”

  • Hx: Presented with a chronic cough and exercise intolerance. He has been this way for several years and the clinical signs have not progressed.


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7-year old Beagle“Dawg”

  • RF

    • The heart shows mild widening and increased sternal contact in the lateral view and rounding of the 5 to 9 o’clock region in the VD view.

    • There is diffuse heavy interstitial infiltrate noted causing the vessels margins to be indistinct.

    • Several thin pleural lines are present likely the result of pleural fibrosis.

    • The diaphragm is cranially displaced with the lumbodiaphragmatic andgle at T 10-11 in the lateral view.

  • RD

    • Mild right-sided cardiac enlargement

    • Diffuse heavy interstitial lung pattern

    • Mild bronchiectasis

  • R/O

    • Pulmonary fibrosis

    • Cor pulmonale

  • Next

    • Follow-up radiographs to monitor progression


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