Viral pneumonias
Viral
respiratory tract infection • Influenza A pneumonia - Ganzer Fall bei Radiopaedia
Ground-glass
opacification • H1N1 pneumonia - Ganzer Fall bei Radiopaedia
Viral
respiratory tract infection • Bilateral pneumonia in transplant lungs - Ganzer Fall bei Radiopaedia
Viral
respiratory tract infection • Respiratory syncytial virus (RSV) pneumonia - Ganzer Fall bei Radiopaedia
Viral
respiratory tract infection • Cytomegalovirus pneumonia in a renal transplant patient - Ganzer Fall bei Radiopaedia
COVID-19
versus H1N1: challenges in radiological diagnosis—comparative study on 130 patients using chest HRCT. Mixed parenchymal/alveolar and airway abnormalities seen with H1N1: 37-year-old male H1N1 patient. a Axial HRCT chest lung window showing right sided mild alveolar ground glass nodular opacities (yellow square). b Axial HRCT lung window showing left lingular zone and to lesser extent right middle lobar air trapping with bronchiectatic changes (blue arrow) and mucous plugging (red arrow)
Covid19-Pneumonie:
Bilaterale, lateral betonte, flaue Infiltrate. Kein Pleuraerguss.
Infant with
respiratory distress who is positive for RSV bronchiolitisCXR shows diffuse airway thickening and hyperexpansion along with an infiltrate obscuring the right heart border and the medial hemidiaphragms bilaterally.The diagnosis was viral pneumonia with a bacterial suprainfection.
Acute
pneumonia evolution. Lateral conventional chest X-ray shows a diffuse nodular pattern.
Acute
pneumonia evolution. Anteroposterior portable conventional chest X-ray revealed diffuse interstitial pattern.
Acute
pneumonia evolution. Posteroanterior conventional chest X-ray with a persistent nodular pattern and no interstitial oedema.
Acute
pneumonia evolution. Posteroanterior conventional chest X-ray depicts a persistent nodular pattern with no interstitial oedema.
Acute
pneumonia evolution. Posteroanterior conventional chest X-ray shows a diffuse bilateral nodular pattern.
COVID-19
versus H1N1: challenges in radiological diagnosis—comparative study on 130 patients using chest HRCT. Pure parenchymal/alveolar pattern which cannot differentiate COVID19 from H1N1. a, b 44-year-old-male COVID-19 patient with axial HRCT chest lung window showing bilateral upper and lower lobar peripheral sub-pleural pure ground glass opacities. They shows smooth septal thickening on the right side “Crazy paving pattern” (red arrows). c, d 54-year-old male H1N1 patient with axial HRCT chest lung window showing bilateral upper and lower lobar mainly peripheral and sub-pleural dense ground glass patches
COVID-19
versus H1N1: challenges in radiological diagnosis—comparative study on 130 patients using chest HRCT. Mixed GGOs and “curvilinear organizing pattern of consolidation” seen with COVID-19. a, b 43-year-old female COVID-19 patient with axial HRCT chest lung window showing right sided upper lobar sub-pleural ground glass patchy showing “crazy paving pattern” (orange arrow) and lower lobar sub-pleural curvilinear pattern of organizing consolidation parallel to the pleural lining (yellow arrow)
COVID-19
versus H1N1: challenges in radiological diagnosis—comparative study on 130 patients using chest HRCT. Severe cases complicated by diffuse alveolar damage (DAD), which cannot differentiate COVID19 from H1N1. a, b 52-year-old male COVID-19 patient with axial HRCT chest lung window showing bilateral ground glass opacities, more extensive and dense on the left side showing “crazy paving pattern” and mixed with mild air filled cystic changes denoting “early DAD.” c, d 58-year-old male H1N1 patient with axial and coronal HRCT chest lung window showing bilateral, predominantly upper lobar, ground glass opacity showing “crazy paving pattern” and mixed with air dilled cystic changes denoting “DAD”
COVID-19
versus H1N1: challenges in radiological diagnosis—comparative study on 130 patients using chest HRCT. Mixed parenchymal/alveolar and airway abnormalities seen with H1N1: 47-year-old male H1N1 patient. a Axial HRCT chest lung window with “MIP” reconstruction demonstrating tree in bud nodules (blue arrows) and small ground-glass opacities. b Axial HRCT lung window showing mild bronchiectatic changes with “signet ring sign” (red arrows), patchy areas of mild air trapping (yellow arrows), and tiny few right lower sub-pleural tree in bud nodules (green arrow)
Acute
pneumonia evolution. Posteroanterior conventional chest X-ray with multiple small calcified nodules. Breast prothesis.
Viral
respiratory tract infection • Metapneumovirus - infant - Ganzer Fall bei Radiopaedia
Acute
pneumonia evolution. MIP and coronal reconstruction with multiple small calcified nodules of chronic varicella pneumonia.
Viral respiratory tract infection is a broad term given to pulmonary infection caused by viruses.
Pathology
They can be caused by any of a large number of viral agents, including but not limited to:
RNA viruses
- orthomyxoviridae
- influenza pneumonia
- H1N1 pneumonia (swine influenza)
- H5N1 pneumonia (avian influenza)
- influenza pneumonia
- paramyxoviridae
- parainfluenza pneumonia (HPIV)
- pneumoviridae
- respiratory syncytial virus (RSV)
- RSV pneumonia
- RSV bronchiolitis
- respiratory syncytial virus (RSV)
- human metapneumovirus (HMTV)
- HMTV pneumonitis
- measles: respiratory tract infection from measles
- mumps: respiratory tract infection from mumps
- coxsackievirus: coxsackievirus respiratory tract infection
- echovirus: echovirus respiratory tract infection
- enterovirus: enterovirus respiratory tract infection
- bunyaviridae
- hantavirus
- coronaviridae - human coronaviruses (hCoV)
- picornaviridae
- rhinovirus
DNA viruses
- adenovirus: adenovirus lung infection
- herpesviridae
- herpes simplex virus (HSV)
- herpes simplex virus type 1 (HSV1) pneumonia
- cytomegalovirus (α herpesvirinae): cytomegalovirus pneumonia
- varicella-zoster virus (VZV) (β herpesvirinae): varicella pneumonia
- herpes simplex virus (HSV)
- Epstein-Barr virus (EBV): EBV pneumonia
- human papillomavirus (HPV): HPV pneumonia
- parvoviridae
Radiographic features
Plain radiograph / CT
The most common findings include bilateral perihilar peribronchial thickening and interstitial infiltrates which, particularly in children, due to their small-caliber airways, can result in areas of atelectasis or air trapping. Sometimes airspace consolidation or hemorrhage may also develop. Pleural effusion, hilar lymphadenopathy and pneumothorax are uncommon findings.
Imaging findings alone are not specific enough for the definitive diagnosis of viral pneumonia and radiographic patterns can be variable, depending on the specific viral strain, as well as host factors.
Siehe auch:
und weiter:
Assoziationen und Differentialdiagnosen zu Viruspneumonie: 
