Bacterial lung infection with very round, well-defined appearance on chest radiography; simulates mass lesion
Majority seen in patients < 8 years of age
Typically occurs with Streptococcus pneumoniae infection
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
DIAGNOSTIC CHECKLIST
Image Interpretation Pearls
Selected References
de Benedictis FM et al: Complicated pneumonia in children. Lancet. 396(10253):786-98, 2020
Andronikou S et al: Computed tomography in children with community-acquired pneumonia. Pediatr Radiol. 47(11):1431-40, 2017
Andronikou S et al: Guidelines for the use of chest radiographs in community-acquired pneumonia in children and adolescents. Pediatr Radiol. 47(11):1405-11, 2017
Liszewski MC et al: Lung magnetic resonance imaging for pneumonia in children. Pediatr Radiol. 47(11):1420-30, 2017
Schooler GR et al: Children with cough and fever: up-to-date imaging evaluation and management. Radiol Clin North Am. 55(4):645-55, 2017
Stadler JAM et al: Lung ultrasound for the diagnosis of community-acquired pneumonia in children. Pediatr Radiol. 47(11):1412-9, 2017
Winant AJ et al: Current updates on pediatric pulmonary infections. Semin Roentgenol. 52(1):35-42, 2017
Jain S et al: Community-acquired pneumonia requiring hospitalization among U.S. children. N Engl J Med. 372(9):835-45, 2015
Pereda MA et al: Lung ultrasound for the diagnosis of pneumonia in children: a meta-analysis. Pediatrics. 135(4):714-22, 2015
Liu J et al: Lung ultrasonography for the diagnosis of severe neonatal pneumonia. Chest. 146(2):383-8, 2014
Liu YL et al: Pediatric round pneumonia. Pediatr Neonatol. 55(6):491-4, 2014
Caiulo VA et al: Lung ultrasound characteristics of community-acquired pneumonia in hospitalized children. Pediatr Pulmonol. 48(3):280-7, 2013
Gorkem SB et al: Evaluation of pediatric thoracic disorders: comparison of unenhanced fast-imaging-sequence 1.5-T MRI and contrast-enhanced MDCT. AJR Am J Roentgenol. 200(6):1352-7, 2013
Yikilmaz A et al: Evaluation of pneumonia in children: comparison of MRI with fast imaging sequences at 1.5T with chest radiographs. Acta Radiol. 52(8):914-9, 2011
Restrepo R et al: Imaging of round pneumonia and mimics in children. Pediatr Radiol. 40(12):1931-40, 2010
Kim YW et al: Round pneumonia: imaging findings in a large series of children. Pediatr Radiol. 37(12):1235-40, 2007
Copley SJ: Application of computed tomography in childhood respiratory infections. Br Med Bull. 61:263-79, 2002
Donnelly LF: Practical issues concerning imaging of pulmonary infection in children. J Thorac Imaging. 16(4):238-50, 2001
Markowitz RI et al: The spectrum of pulmonary infection in the immunocompromised child. Semin Roentgenol. 35(2):171-80, 2000
Donnelly LF: Maximizing the usefulness of imaging in children with community-acquired pneumonia. AJR Am J Roentgenol. 172(2):505-12, 1999
Katz DS et al: Radiology of pneumonia. Clin Chest Med. 20(3):549-62, 1999
Price J: Round pneumonia and focal organizing pneumonia are different entities. AJR Am J Roentgenol. 172(2):549-50, 1999
Donnelly LF et al: The yield of CT of children who have complicated pneumonia and noncontributory chest radiography. AJR Am J Roentgenol. 170(6):1627-31, 1998
Wagner AL et al: Radiologic manifestations of round pneumonia in adults. AJR Am J Roentgenol. 170(3):723-6, 1998
Katsumura Y et al: Pneumococcal spherical pneumonia multiply distributed in one lung. Eur Respir J. 10(10):2423-4, 1997
Wahlgren H et al: Radiographic patterns and viral studies in childhood pneumonia at various ages. Pediatr Radiol. 25(8):627-30, 1995
Kirkpatrick JA: Pneumonia in children as it differs from adult pneumonia. Semin Roentgenol. 15(1):96-103, 1980
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KEY FACTS
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TERMINOLOGY
Definitions
Bacterial lung infection with very round, well-defined appearance on chest radiography; simulates mass lesion
Majority seen in patients < 8 years of age
Typically occurs with Streptococcus pneumoniae infection
IMAGING
General Features
Radiographic Findings
CT Findings
MR Findings
Ultrasonographic Findings
Imaging Recommendations
DIFFERENTIAL DIAGNOSIS
PATHOLOGY
General Features
Gross Pathologic & Surgical Features
CLINICAL ISSUES
Presentation
Demographics
Natural History & Prognosis
DIAGNOSTIC CHECKLIST
Image Interpretation Pearls
Selected References
de Benedictis FM et al: Complicated pneumonia in children. Lancet. 396(10253):786-98, 2020
Andronikou S et al: Computed tomography in children with community-acquired pneumonia. Pediatr Radiol. 47(11):1431-40, 2017
Andronikou S et al: Guidelines for the use of chest radiographs in community-acquired pneumonia in children and adolescents. Pediatr Radiol. 47(11):1405-11, 2017
Liszewski MC et al: Lung magnetic resonance imaging for pneumonia in children. Pediatr Radiol. 47(11):1420-30, 2017
Schooler GR et al: Children with cough and fever: up-to-date imaging evaluation and management. Radiol Clin North Am. 55(4):645-55, 2017
Stadler JAM et al: Lung ultrasound for the diagnosis of community-acquired pneumonia in children. Pediatr Radiol. 47(11):1412-9, 2017
Winant AJ et al: Current updates on pediatric pulmonary infections. Semin Roentgenol. 52(1):35-42, 2017
Jain S et al: Community-acquired pneumonia requiring hospitalization among U.S. children. N Engl J Med. 372(9):835-45, 2015
Pereda MA et al: Lung ultrasound for the diagnosis of pneumonia in children: a meta-analysis. Pediatrics. 135(4):714-22, 2015
Liu J et al: Lung ultrasonography for the diagnosis of severe neonatal pneumonia. Chest. 146(2):383-8, 2014
Liu YL et al: Pediatric round pneumonia. Pediatr Neonatol. 55(6):491-4, 2014
Caiulo VA et al: Lung ultrasound characteristics of community-acquired pneumonia in hospitalized children. Pediatr Pulmonol. 48(3):280-7, 2013
Gorkem SB et al: Evaluation of pediatric thoracic disorders: comparison of unenhanced fast-imaging-sequence 1.5-T MRI and contrast-enhanced MDCT. AJR Am J Roentgenol. 200(6):1352-7, 2013
Yikilmaz A et al: Evaluation of pneumonia in children: comparison of MRI with fast imaging sequences at 1.5T with chest radiographs. Acta Radiol. 52(8):914-9, 2011
Restrepo R et al: Imaging of round pneumonia and mimics in children. Pediatr Radiol. 40(12):1931-40, 2010
Kim YW et al: Round pneumonia: imaging findings in a large series of children. Pediatr Radiol. 37(12):1235-40, 2007
Copley SJ: Application of computed tomography in childhood respiratory infections. Br Med Bull. 61:263-79, 2002
Donnelly LF: Practical issues concerning imaging of pulmonary infection in children. J Thorac Imaging. 16(4):238-50, 2001
Markowitz RI et al: The spectrum of pulmonary infection in the immunocompromised child. Semin Roentgenol. 35(2):171-80, 2000
Donnelly LF: Maximizing the usefulness of imaging in children with community-acquired pneumonia. AJR Am J Roentgenol. 172(2):505-12, 1999
Katz DS et al: Radiology of pneumonia. Clin Chest Med. 20(3):549-62, 1999
Price J: Round pneumonia and focal organizing pneumonia are different entities. AJR Am J Roentgenol. 172(2):549-50, 1999
Donnelly LF et al: The yield of CT of children who have complicated pneumonia and noncontributory chest radiography. AJR Am J Roentgenol. 170(6):1627-31, 1998
Wagner AL et al: Radiologic manifestations of round pneumonia in adults. AJR Am J Roentgenol. 170(3):723-6, 1998
Katsumura Y et al: Pneumococcal spherical pneumonia multiply distributed in one lung. Eur Respir J. 10(10):2423-4, 1997
Wahlgren H et al: Radiographic patterns and viral studies in childhood pneumonia at various ages. Pediatr Radiol. 25(8):627-30, 1995
Kirkpatrick JA: Pneumonia in children as it differs from adult pneumonia. Semin Roentgenol. 15(1):96-103, 1980
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