Citation, DOI, disclosures and article data
Citation:
Gaillard F, Ranchod A, Niknejad M, et al. Bulging fissure sign (lobar consolidation). Reference article, Radiopaedia.org (Accessed on 15 Mar 2025) https://doi.org/10.53347/rID-9228
The bulging fissure sign refers to lobar consolidation where the affected portion of the lung is expanded, causing displacement of the adjacent fissure. Any type of pneumonia or space-occupying process can lead to bulging (sagging) fissure sign. Classically, it has been described in right upper lobe (RUL) consolidation secondary to Klebsiella pneumonia. It is now rarely seen due to prompt antibiotic therapy for suspected pneumonia.
The most common infective causative agents are 1:
Other uncommon agents are:
It may also be seen with:
See also
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1. Collins J, Stern EJ. Chest radiology, the essentials. Lippincott Williams & Wilkins. (2007) ISBN:0781763142. Read it at Google Books - Find it at Amazon
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2. Tan MJ, Tan JS, Hamor RH et-al. The radiologic manifestations of Legionnaire's disease. The Ohio Community-Based Pneumonia Incidence Study Group. Chest. 2000;117 (2): 398-403. doi:10.1378/chest.117.2.398 - Pubmed citation
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3. Lucas RS, Kuzmowych TV, Spagnolo SV. Legionella pneumonia presenting as a bulging fissure on chest roentgenogram. Chest. 1991;100 (2): 567-8. doi:10.1378/chest.100.2.567 - Pubmed citation
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4. Adler B, Padley S, Miller RR et-al. High-resolution CT of bronchioloalveolar carcinoma. AJR Am J Roentgenol. 1992;159 (2): 275-7. AJR Am J Roentgenol (abstract) - Pubmed citation
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5. Collins J, Stern EJ. Chest radiology, the essentials. Lippincott Williams & Wilkins. (2007) ISBN:0781763142. Read it at Google Books - Find it at Amazon
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6. Schmidt AJ, Stark P. Radiographic findings in Klebsiella (Friedlander's) pneumonia: the bulging fissure sign. Semin Respir Infect. 1998;13 (1): 80-2. - Pubmed citation
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