Septal Interlobular
Key Facts
  • Short reticular lines within secondary pulmonary lobule
  • Uniform thickening or beading of the bronchovascular core and or septa
Pattern
  • Normal septa scattered and infrequent at HRCT
  • Abnormal septa may be uniformly thickened or beaded
Differential Diagnosis
  • Lymphangitic spread of tumor
  • Silicosis
  • IPF
  • Asbestosis
  • Scleroderma
  • Rheumatoid arthritis
  • Pulmonary edema
  • Veno-occlusive disease
  • Erdheim Chester Disease
References

Colby TV, Swensen SJ. Anatomic distribution and histopathologic patterns in diffuse lung disease: correlation with HRCT. J Thorac Imag 11: 1-26, 1996.